There should be a ban on overused phrases and ones that are really annoying; and ones that should have expired. I have a few candidates.
My Bad - Used instead of "I made a mistake". From the first day I heard this one it grated on my grammatical sense. It sounds so juvenile and illiterate. I've never used it.
Throw him/her/them under the bus - This one is just plan old and worn out. Retire it.

Down here in South Jersey there are two phrases I hear all time and I want to know if they are unique to this area or are they common in other areas. By common I mean used all the time.
Have a good one. Used when departing instead of "have a nice day" or simply "goodbye".
No Problem.Used as a response to "thank you". Both of them bug me.