look up any word, like plopping:
 
1.
to do a lot or do way too much
I have been working my ass off!
by krazykrackadrew July 11, 2004
 
2.
HAS NO MEANING, just a rhythmic expression.
Eminem's MY DAD'S GONE CRAZY: "I'm outta the closet, I've been lyin' my ass off".
by Fangsta March 18, 2003