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Phrase(s): Give it up!
Inf. Stop trying!; You are wasting your time! (Fixed order.) • Bob: I just can’t understand calculus! Bill: Give it up! Get out of that course and get into something less cruel. • Tom: I’m just not a very good singer, I guess. Sue: It’s no good, Tom. Give it up! Tom: Don’t you think I’m doing better, though? Sue: Give it up, Tom!
McGrawhill's American Idioms And Phrasal Verbs