the back is a room in which after you meet someone and have a good time with them you go too, to have even more fun :))
Person 1: You look tremendous
Person 2: Wanna head to the back?
It usually means the back of the bank
Guy 1: we are about to pull up to the back
Guy2: do you mean the bank
Guy3*smacks him* no the back. It’s short the bank of the bank
Could be something moving backwards or maybe the return of someone/something.
"Yo, bro did you hear about rregretzz?"
"No what happened?"
"He is back!"
When someone stops at a red light next to an old person, slowly starts backing up, and yells "put on your brakes!" at them.
I can't wait for the day I get to back-up-break some unsuspecting old fart!