To bust ass is to fart.  BUT if used with a possesive, it means to work hard.
Also often used with a possessive and immediately followed by an infinitive
Also often used with a possessive and immediately followed by an infinitive
I just busted ass and it smells real bad.
You better be busting your ass if you want to finish the job on schedule.
I was busting my ass to finish my homework on time.
You better be busting your ass if you want to finish the job on schedule.
I was busting my ass to finish my homework on time.
by suckondeez May 14, 2003
 Get the bust assmug.
Get the bust assmug. by RA news July 20, 2009
 Get the bust a missionmug.
Get the bust a missionmug. by Cappy1 June 11, 2004
 Get the Nut Bustmug.
Get the Nut Bustmug. by Solid Mantis August 9, 2016
 Get the Bust a movemug.
Get the Bust a movemug. When in the act of getting a blowjob, you pull your penis out right before shooting your load and stuff it into your partner's nose. Your load goes up one side of her nose and back down the other.
Dude! I was totally Busting a "U" on this chick I took home from the bar last night. This morning she woke up whining and complaining about a stuffy nose! Can you believe that? What a bitch!
by dirtybuccaneer August 9, 2009
 Get the Busting a "U"mug.
Get the Busting a "U"mug. by lode June 7, 2004
 Get the bust a nutmug.
Get the bust a nutmug. 