Used in place of the term mothaf..ka.A term of endearment. Not meant to be used with malice or to harm one's character. Also, it can be used in place of the harsh term to not invoke or spark bad feelings in a group because of its use.
I met a MoFo playing GTA IV online. Met him on Halo 3. Met him on Saints Row. I couldnt stand anymore so i went to some hookers intown for calming me down. I met a bum with a X360. He was the MoFo i met. I went online and KILLD DAT MOFO.