What is Bust Ass?
1.
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.
2.
To work really hard on something.
Dude, you'd better bust ass if you wanna finish that on time!
3.
when somebody lets out a disgustingly huge fart; this is usually announced.
"Whoa shit you guys! Back up! I'm about to bust ass"
See
4.
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.
See
5.
To fall real hard on ones ass.
Leslie slipped and busted her ass
6.
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!"
See
7.
To fracture a donkey or mule.
I wa fiddin to go to town bu my mule wouldnt move so then i was fiddin to bust its ass.