Abbreviation of "smack-ass"
A
person who is
rude, obnoxious or vulgar; a jerk or asshole
Commonly used by someone to refer to a person that is telling them things they
don't want to hear
Mike: Laura, why aren't the dishes done?
Laura: I'
m sorry, I was busy.
Mike: I'm at
work all day and when I get
home the first thing I have to do is clean. Why are you never able to save me that trouble?
Laura: I do have other things to do, you know.
Mike: Like what, watch QVC, eat cookies, and
sleep?
Laura: You know what, you're a real smack!
Mike: And you're a useless piece of shit! Now that we've stated the obvious, where's my dinner?