What is Mfcsb?
1.
Motherfucking Cocksucking Bitch or Motherfucking Cocksucking Bastard.
Flat out one of the best ways to make fun of someone. It means exactly what it stands for.
Developed by myself.
Dude1: Yo, dude, it looks like u put some weight on!
Dude2: Bull shit, you MFCSB!
See
Random Words:
1.
someone that is really mainstream, is a chav but denies it and likes 'indie', mainly oasis or kaiser cheifs
look at that chin..