ace it

Idioms and Phrases

Accomplish something with success, as in I'm sure he'll ace it when he takes that bar exam . The verb ace originated in tennis with the meaning “to hit an unreturnable serve against an opponent.” The idiom ace it , however, originated as student slang for getting an “A” on an exam or in a course but soon was extended to other successful accomplishments. [ Slang ; mid-1900s]