bust ass 

To work really hard on something.

Dude, you'd better bust ass if you wanna finish that on time!

bust ass by Anonymous March 26, 2003

bust ass 

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

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.

bust ass by suckondeez May 14, 2003

bust ass 

when somebody lets out a disgustingly huge fart; this is usually announced.

"Whoa shit you guys! Back up! I'm about to bust ass"

bust ass by britt October 30, 2003

bust ass 

To fall real hard on ones ass.

Leslie slipped and busted her ass

bust ass by Pea December 30, 2003

bust ass 

to rip an unprecdentedly large fart, one that sounds like a large plane has just flown overhead

also see busting ass

past tense: busted ass

"Hold on to your hats everyone, I have to bust ass"

"Damn, it sounds like a grizzly bear growling in here! No, it was just dad busting ass again"

"My ol' man busted ass so hard it woke me up!"

bust ass by weeze November 16, 2004

bust ass 

A woman whose breast cleavage looks like someone's buttocks.

Damn, wigga! Your woman's gotta bust ass. You best keep her off the beach.

bust ass by fucwad April 25, 2004

bust ass 

As a noun: a fart; as a verb: to fart, or sometimes to involuntarily emit a spray of fecal matter.

I busted ass can you smell it

bust ass by Anonymous June 17, 2003