MYFB 

Acronym for Mind your fucking business. Not my young fire brigade.

"Dude, what're you doing tonight?"
"Dude, MYFB."
"Dude, sorry, didn't know you'd be entertaining yourself."

MYFB by Soiled Undergarment August 13, 2003

DH'n my FB's 

Dry humping my fun bags

If you can't believe what you just heard. "you gotta be DH'n my FB's "

DH'n my FB's by BK aka BK December 17, 2006