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2. smart ass mother fucker
Someone who is acting like a gay smartass.
Joe: It looks like he is saying kiss me kiss me.

Chris: Smart Ass mother fucker.
1. Smart Ass Mother Fucker
Very similar to Bad Ass Mother Fucker only instead of being a Bad Ass your a Smart Ass (and not a bad kind of smart ass).
guy 1 "John can do particle nuclear physics in his head while high!"

guy 2 " Yeah John is one Smart Ass Mother Fucker"
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