an abbreviation not understood by elders most commonly understood by teenagers standing for "mother fucker"
Ann's mother: why don't you hang out with Kate anymore?
Ann: Shes suck a mo fo.
Ann's mother: what does that mean?
Ann: ohhh nothing
Ann: Shes suck a mo fo.
Ann's mother: what does that mean?
Ann: ohhh nothing
by diva12 October 20, 2009
you say this to greet a friend, especially one you have many inside jokes with. also, this is used to seem showy and cool that you have a friend you can pronounce as loudly as most people say this
by diva12 October 20, 2009