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a loose cannon

Idiom Safety

Meaning

A person who behaves unpredictably and may cause problems.

Example Sentences

"Be careful with him — he’s a loose cannon."

Related Expressions

Pyrrhic victory

A victory won at too great a cost to be worthwhile.

in full swing

at the peak of activity or progress

Sow the seeds

To begin a process that will develop in the future.

mend a broken heart

to heal from emotional pain after a breakup

shocked to the core

deeply shocked or disturbed

gear toward

to design or aim something for a particular group