a well cool way of saying yo or sup to ya m8s like if ya friend walked through the door u could say "sup mofo whats crackin home boy",its also a shorter way of saying mother f***er in da nice way
if someone said...
mofo - if someone say that to u dey is bein well nice to u
mother f**cker - if dey say dat they is bein a right knob and batty boy
"yo mofo wats crackin homeboy"