bustin ass 

Workin' hard, getting shot done.

John doesn't know what it means, which means he's gotta bust ass to know!

Jim got a promotion, he must be bustin ass.

bustin ass by Rightoknow April 21, 2014

busting ass 

To bust someone's ass. To severely beat them in a particular activity. Often used when speaking about sports.

Damn, Chris Paul just hit another And 1. He is busting ass right now.

busting ass by packman889 May 15, 2011

Bussin Ass 

When you have sex with a girl and she can't take it

Keenan was bussin ass last night she was screaming his name

Bussin Ass by TraceOg October 5, 2016

Busting ass 

to give someone a back shot. Particularly to a man.

Y’all help poor Jeff out. He’s been busting ass.

Busting ass by devonfonix69 August 30, 2021

Busting one's Ass

Busting one's ass means to work extremely hard on something often to the point of losing sleep over an unfinished project.

James was making videos on YouTube about video games. Somebody else pops up and he does a similar thing (Let's just call him Christian) and he is getting tens of thousands of subscribers for what he does. James on the other hand is busting his ass out to make good content for his followers and Christian is getting more subscribers every day. Suddenly, other users point out that Christian is a cheap imitation of James and many users unsub from Christian and subscribe to James.

Christian fades away into obscurity and tries to make fake troll videos directed at James's fans. Chris becomes hated by the internet and starts to abuse his partnership and removed entire Youtube channels which criticised him.

Busting one's Ass

Busting one's Ass by Cazaam October 9, 2014

Busting Caps in Somebody's Ass 

Used by gangstas it means "to shoot somebody"

I'm gonna bust a cap in your ass bitch (fires gun)

He's busting caps in somebody's ass fo sho

Busting Caps in Somebody's Ass by Jorgepfan February 22, 2009

businass 

used to describe the look of female booty in business pants/dress pants

she is definately handlin her businass

businass by erratic assassin May 28, 2009