Bust Back 

To shoot back at someone if they are shooting at you.

"Run from tha police, picture that, Nigga Im too fat, Ill Fuck around and catch an azsmah attack, Thats why I bust back, It dont phase me, When he drops, Take his glock"

From the Song Runnin'

Bust Back by ChristheSureno May 30, 2006

bust your back out 

to have strenuous sex

"Look, I'm not trying to date you. I just wanna bust your back out."

bust your back out by TDOW December 20, 2008

Back Bumper Bust 

When you fuck a girl in the open space of your trunk and after you finish, you push her down in the trunk space, slam it shut and drive her home while she's in the trunk.

I gave bridgette a back bumper bust last night, she was so mad.

Back Bumper Bust by JDAltazar January 29, 2003

Back-door bust 

When she looks GREAT from behind, but then when she turns around...

Related to a butter face.

Hair flowing, butt glowing, legs going on 'til sunrise, and a figure that'd blind even the Gods...then she turned around

THAT is a back-door bust.

Back-door bust by ;lsdkfj;lsck February 24, 2012