No offense to all of the RI guys in here, but if I never hear "not for nothin'" again, I'll be happy. Also, not a phrase but annoying as all hell for me is when kids who grew up using computers never spell out complete words or sentences.
I have another. Not so much a phrase but the way something is phrased. It's epidemic among our youth. When you ask them a question and they respond, but at the end of the response their voice goes up so it sounds like their statement is a question. That bugs me.