model evaluation
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idiom

model evaluation

Meaning
the process of assessing the accuracy and performance of a trained model
Example
Before deploying the system, we need to perform **model evaluation** to ensure accuracy.
idiom

reach for the stars

Meaning
to aim for something very ambitious or difficult to achieve
Example
She always tells her students to **reach for the stars** and never give up.
idiom

let someone off the hook

Meaning
to release someone from blame or punishment
Example
The judge decided to **let him off the hook** with a warning.
idiom

open and shut case

Meaning
a case that is easily decided or obvious
Example
It was an **open and shut case** with clear evidence.
idiom

weigh your options

Meaning
to consider different possibilities before deciding
Example
You should **weigh your options** before buying the car.
idiom

Go Dutch

Meaning
To share the cost of something equally.
Example
Let’s **go Dutch** on the dinner tonight.
idiom

to kick the bucket

Meaning
to die (humorous or informal)
Example
He used to joke that he’d travel the world before he **kicked the bucket**.
idiom

out of the box thinking

Meaning
thinking in a new, innovative, or creative way
Example
The solution requires **out of the box thinking** from all team members.
idiom

Keep a cool head

Meaning
to remain calm and not get too emotional
Example
In a crisis, it's important to **keep a cool head**.
idiom

Ride it out

Meaning
Endure a difficult situation until it improves.
Example
We just need to **ride it out** until things get better.
idiom

Ask the right questions

Meaning
To inquire wisely to gain understanding.
Example
Good researchers always **ask the right questions**.
idiom

backdoor entry

Meaning
a secret or unofficial way to access something
Example
Hackers found a **backdoor entry** into the company’s database.
idiom

out of this world

Meaning
extremely good or impressive
Example
The food at that restaurant is **out of this world**.
idiom

a window of opportunity

Meaning
a short period when one has a chance to act effectively
Example
We have **a window of opportunity** to finalize the deal this week.
idiom

wear the pants

Meaning
to be the person who controls or makes decisions in a family
Example
Everyone knows she **wears the pants** in the house.
idiom

above board

Meaning
honest and legal; without deceit
Example
Their business deal was completely **above board**.
idiom

give someone the creeps

Meaning
to make someone feel uncomfortable or afraid
Example
Old abandoned houses **give me the creeps**.
idiom

zero in

Meaning
to focus closely on something
Example
Our analysis should **zero in** on customer pain points.
idiom

latch onto

Meaning
to quickly embrace an idea or connect with someone
Example
The students quickly **latched onto** the new study app.
idiom

An arm and a leg

Meaning
Something that is very expensive.
Example
That new phone costs **an arm and a leg**, but it’s worth it.
idiom

have words with

Meaning
to argue or disagree with someone
Example
She **had words with** her boss about the new schedule.
idiom

runs in the family

Meaning
a trait or quality common among family members
Example
Musical talent **runs in the family**.
idiom

pass sentence

Meaning
to announce a punishment in court
Example
The judge will **pass sentence** next week.
idiom

hang back

Meaning
to remain behind or hesitate to act
Example
If you **hang back**, you might miss the opportunity.
idiom

go to battle

Meaning
to prepare to fight or compete strongly
Example
Our team is ready to **go to battle** in the finals.
idiom

heart of stone

Meaning
to be unkind or without compassion
Example
She must have a **heart of stone** to ignore that crying child.
idiom

born in the purple

Meaning
born into a wealthy or royal family
Example
He was **born in the purple**, so wealth was never an issue.
idiom

figure out

Meaning
to understand or solve something
Example
We need to **figure out** why the emails bounced.
idiom

Dust yourself off

Meaning
Recover after a setback and continue with confidence.
Example
He fell short this time, but he’ll **dust himself off** and try again.
idiom

a shoulder to lean on

Meaning
someone to give you support and comfort
Example
She’s always been **a shoulder to lean on** for me.
idiom

at the top of one’s game

Meaning
to be performing at one’s best level
Example
The athlete is **at the top of his game** this season.
idiom

Keep someone posted

Meaning
To keep someone informed about something.
Example
Please **keep me posted** about any updates.
idiom

a stroke of luck

Meaning
something good that happens by chance
Example
It was **a stroke of luck** that I found my lost wallet.
idiom

act your age

Meaning
behave in a manner appropriate to your age
Example
Stop being so childish and **act your age**!
idiom

outstanding in one’s field

Meaning
to be exceptionally good at one’s work
Example
She’s **outstanding in her field** as a scientist.
idiom

teach an old dog new tricks

Meaning
to try to teach someone something that is difficult for them to learn due to their age or experience
Example
It's hard to **teach an old dog new tricks**, but I'll try.
idiom

fall for someone

Meaning
to start loving someone; to develop romantic feelings
Example
He **fell for** her the moment he saw her smile.
idiom

Trickle-down effect

Meaning
Economic benefits of the wealthy gradually reaching the lower-income groups.
Example
Critics argue that the **trickle-down effect** rarely helps the poor.
idiom

a foot in the door

Meaning
to have a small opportunity to start working in a company or industry
Example
An internship is a great way to get **a foot in the door**.
idiom

take someone's word for it

Meaning
to trust that what someone says is true
Example
I’ll **take your word for it** since you were there.
idiom

beyond your wildest dreams

Meaning
better or more amazing than imagined
Example
Her success was **beyond her wildest dreams**.
idiom

a snowball effect

Meaning
a situation in which something increases in size or importance at a faster and faster rate
Example
The more followers she got, the more famous she became, creating **a snowball effect**.
idiom

back on your feet

Meaning
recovered and healthy again
Example
It’s good to see you **back on your feet** after the flu.
idiom

a friend in need is a friend indeed

Meaning
a true friend helps you in difficult times
Example
When I was sick, Jane took care of me—**a friend in need is a friend indeed**.
idiom

draw down

Meaning
to reduce the level or amount of something
Example
We plan to **draw down** inventory over the summer.
idiom

Pump money into

Meaning
To invest large amounts of money to boost growth.
Example
The government plans to **pump money into** infrastructure projects.
idiom

Pull together

Meaning
To work as a group to achieve something.
Example
If we all **pull together**, we can finish the project on time.
idiom

pull someone's leg

Meaning
to tease or joke with someone in a playful way
Example
Don't worry, I was just **pulling your leg** about the test results.
idiom

a universe of possibilities

Meaning
endless opportunities or options
Example
Technology has opened **a universe of possibilities**.
idiom

SEO (Search Engine Optimization)

Meaning
The process of improving the visibility of a website or web page in a search engine's unpaid results.
Example
To improve our search rankings, we need to focus on **SEO** strategies.
idiom

go for broke

Meaning
to risk everything to achieve success
Example
They decided to **go for broke** and launch their new product.
idiom

When the going gets tough, the tough get going

Meaning
Strong people keep working hard even in difficulties.
Example
**When the going gets tough, the tough get going** — never lose hope.
idiom

malware

Meaning
software designed to damage or disrupt computers or networks
Example
The antivirus software successfully removed the **malware** from the system.
idiom

the honest truth

Meaning
the absolute and complete truth
Example
To tell you **the honest truth**, I didn’t enjoy the trip.
idiom

time will tell

Meaning
the future will reveal the outcome
Example
**Time will tell** whether this was the right decision.
idiom

call on

Meaning
to request someone to speak or do something
Example
The teacher will **call on** you if you raise your hand.
idiom

play God

Meaning
to make decisions that have extreme control over life or morality
Example
Some people fear AI researchers are trying to **play God**.
idiom

to have a lot on one's plate

Meaning
to have a lot of tasks or responsibilities to deal with
Example
She can't take on any more projects; she already has **a lot on her plate**.
idiom

talk up

Meaning
to praise or promote something enthusiastically
Example
The host will **talk up** the new menu tonight.
idiom

set down

Meaning
to place something or write something down
Example
**Set down** your ideas so we can review them.
idiom

play both sides

Meaning
to support opposing parties to gain advantage
Example
Some lobbyists are known to **play both sides** of the issue.
idiom

Clean hands

Meaning
To be innocent or free from guilt.
Example
He claims to have **clean hands** in the scandal.
idiom

chew someone out

Meaning
to angrily scold or criticize someone
Example
The coach **chewed out** the team for their poor performance.
idiom

Keep your head above water

Meaning
Manage to survive or cope with difficulties.
Example
It’s hard, but I’m trying to **keep my head above water**.
idiom

rise to the occasion

Meaning
to perform well in a difficult situation
Example
He really **rose to the occasion** during the crisis.
idiom

out of memory

Meaning
unable to think clearly; mentally exhausted
Example
After working all night, I was completely **out of memory**.
idiom

heart in one’s mouth

Meaning
to feel extreme fear or anxiety
Example
My **heart was in my mouth** as I waited for the results.
idiom

draw a line

Meaning
to set a limit or boundary
Example
You have to **draw a line** between work and personal life.
idiom

break into

Meaning
to enter a new field or profession successfully
Example
She managed to **break into** the film industry last year.
idiom

let bygones be bygones

Meaning
to forget past disagreements and forgive each other
Example
They decided to **let bygones be bygones** and move forward.
idiom

taste of success

Meaning
to experience success for the first time
Example
After years of struggle, he finally got a **taste of success**.
idiom

hear it through the grapevine

Meaning
to hear a rumor or unofficial news
Example
I **heard it through the grapevine** that they broke up.
idiom

talk out

Meaning
to discuss something until a decision is reached
Example
Let’s **talk out** the disagreement today.
idiom

an apple a day keeps the doctor away

Meaning
eating healthy food helps you stay well
Example
My mom always says, '**An apple a day keeps the doctor away**.'
idiom

keep it together

Meaning
to stay composed during difficult times
Example
Even after hearing the bad news, he managed to **keep it together**.
idiom

cast in stone

Meaning
fixed and unchangeable
Example
The script isn’t **cast in stone**; we can make changes.
idiom

nurture talent

Meaning
to help someone's skills and abilities grow and develop
Example
A great mentor knows how to **nurture talent** and help their mentees grow.
idiom

Front page news

Meaning
Extremely important or widely discussed news
Example
His heroic act became **front page news** the next morning.
idiom

the story breaks

Meaning
when news becomes public or is first reported
Example
When **the story broke**, everyone was shocked.
idiom

black and blue

Meaning
bruised; having marks from injury
Example
He was **black and blue** after falling off his bike.
idiom

Ask a million questions

Meaning
To be extremely curious and ask many questions.
Example
Kids often **ask a million questions** about everything.
idiom

Pivot the business

Meaning
To change direction or strategy to adapt to the market.
Example
After poor sales, they decided to **pivot the business** toward software solutions.
idiom

sour grapes

Meaning
pretending to dislike something you can’t have
Example
His comments about the award being unfair are just **sour grapes**.
idiom

take the lead

Meaning
to go ahead or be in front in a competition
Example
Our team **took the lead** in the final round.
idiom

put one's foot in one's mouth

Meaning
to say something embarrassing or inappropriate
Example
He really **put his foot in his mouth** when he mentioned her ex-boyfriend.
idiom

a shot in the arm

Meaning
something that gives encouragement or energy
Example
The new funding was **a real shot in the arm** for the project.
idiom

opt out

Meaning
to choose not to participate
Example
Employees can **opt out** of the program if they want.
idiom

Keep the tradition alive

Meaning
To continue practicing a custom so that it is not forgotten
Example
Every year we celebrate this festival to **keep the tradition alive**.
idiom

the lights are on but nobody’s home

Meaning
someone appears active but is not thinking clearly
Example
When the AI glitched, it was like **the lights were on but nobody’s home**.
idiom

eat one's words

Meaning
to admit that what one said was wrong
Example
He had to **eat his words** after breaking his promise.
idiom

bootstrap a startup

Meaning
to build a business using limited resources without external funding
Example
Many successful founders **bootstrapped their startups** in the early days.
idiom

to boot up

Meaning
to start something; to begin working or functioning
Example
Let’s **boot up** the new project today and see how it goes.
idiom

Don Quixote

Meaning
A person who is overly idealistic, unrealistic, or impractical.
Example
He’s being **a Don Quixote**, chasing impossible dreams.
idiom

to make a boo-boo

Meaning
to make a small or funny mistake
Example
Oops, I **made a boo-boo** and sent the wrong file!
idiom

phishing expedition

Meaning
an attempt to obtain sensitive information by deceit
Example
The suspicious email was part of a **phishing expedition**.
idiom

It rings a bell

Meaning
something sounds familiar
Example
That name **rings a bell**, but I can’t remember where I heard it.
idiom

fed up with

Meaning
tired or annoyed with something
Example
I'm **fed up with** doing the same thing every day.
idiom

When in Rome, do as the Romans do

Meaning
Adapt to the customs of the place you are visiting
Example
When traveling abroad, it's wise to **do as the Romans do**.
idiom

In the blink of an eye

Meaning
Very quickly, almost instantaneously.
Example
The discovery of the new planet happened **in the blink of an eye**.
idiom

Photo finish

Meaning
A very close competition
Example
The race ended in a **photo finish**.
idiom

take the rap

Meaning
to be punished or blamed for something, often unfairly.
Example
He **took the rap** for the team’s poor performance.
idiom

push yourself to the limit

Meaning
to make maximum effort even when it’s tough
Example
Athletes **push themselves to the limit** to achieve their dreams.
idiom

beta test

Meaning
to test a product before official release
Example
We are going to **beta test** our app next week.
idiom

a lightbulb moment

Meaning
a sudden realization or understanding
Example
When I saw the results, I had a **lightbulb moment**.
idiom

Handed down

Meaning
To give or leave something to someone younger or from a previous generation
Example
This antique watch was **handed down** to me from my grandfather.
idiom

plant the seed

Meaning
to introduce an idea subtly to influence someone later
Example
He **planted the seed** for the project during the discussion.
idiom

move up the ladder

Meaning
to be promoted or advance in one’s job
Example
She hopes to **move up the ladder** by the end of the year.
idiom

new blood

Meaning
new people who bring fresh ideas
Example
The company needs **new blood** to stay competitive.
idiom

ray of hope

Meaning
a small sign that something good might happen
Example
The new treatment offers a **ray of hope** for patients.
idiom

the last straw

Meaning
the final problem that makes a situation unbearable
Example
His rude comment was **the last straw** for her.
idiom

own up to your mistakes

Meaning
to admit that you have done something wrong
Example
It takes courage to **own up to your mistakes**.
idiom

reach for the moon

Meaning
to set very high goals
Example
Don’t be afraid to **reach for the moon**.
idiom

take by surprise

Meaning
to catch someone off guard; to surprise unexpectedly
Example
The sudden rain **took us by surprise**.
idiom

play one's cards close to one's chest

Meaning
to keep one's plans or ideas secret
Example
He always **plays his cards close to his chest** in business.
idiom

freak out

Meaning
to become very anxious, upset, or scared
Example
She **freaked out** when she saw the spider.
idiom

roll credits

Meaning
to finish or conclude something
Example
Once the project is done, we can **roll credits**.
idiom

Left no stone unturned

Meaning
To try every possible way to achieve something.
Example
The detective **left no stone unturned** to find the truth.
idiom

double-edged sword

Meaning
something that has both positive and negative consequences
Example
AI surveillance is a **double-edged sword** for security and privacy.
idiom

Face the truth

Meaning
To accept the reality of a situation, even if it’s unpleasant.
Example
You have to **face the truth** about your finances.
idiom

good Samaritan

Meaning
a person who helps others selflessly
Example
A **good Samaritan** helped the old man cross the street.
idiom

rocket science

Meaning
something very complicated or difficult to understand
Example
Coding isn’t **rocket science** if you practice regularly.