What is Back The Fuck Up?
1.
a hostile directive to retreat; usually to feign an attempt to prevent an altercation.
Nigga, You had best to back the fuck up offa me fo I beat yo bitch-ass!
See 
2.
Threat suggesting that the enemy should leave or be quite. The enemy may take the advice (see 
"I've got a bat with your name on it. Best for you to
back the fuck up ."
Random Words:
1. 
it's pretty self explanatory
person 1: oh yeah, ur mom is dead!
person 2: yeah? well i shit in ur mom's mouth, for 50p. Half.. 
1. 
person with red hair and no freckles in the winter, then blonde hair and freckles in the summer.
danika isaacson
"damn that ginga..