To make an irreversible decision or take a step from which there is no turning back.
"By quitting his job, he crossed the Rubicon and committed to his startup dream."
to have romantic feelings for someone, often secretly
to devote time or space to something
to solve a problem through programming skills
To exaggerate a small problem and make it seem much bigger t...
to hope that things will happen the way you want
to not worry about something until it happens