SMB FF 

Developed and used in the common work place and social situations when passing by a friend or commenting on a remark. An add on the Original SMB. Standing for Suck My Balls Fucking Faggot.

Mark "we just ran train on you in beer pong"
Tim " SMB FF"

SMB FF by 1121212hh March 13, 2010

SMBFF

Stands for Straight Male Best Friend Forever, basically a GBF (Gay Best Friend) for lesbians.

Person: "Hey, did you talk to Shane yesterday?"
Lesbian: "Of course I did. He's my SMBFF."

SMBFF by Sistry January 15, 2011