a term used to replace the common mofo (mothafucka)it stands for mothasucka because swearing is a dirty habbit so when tempted to use mofo use moso!
in the following situation moso is used as a diss:
your a fucking bitch, moso
A smexy, cool & unique guy. Everyone loves him, A guy who has the brains & good looks in his blood.
Hey your a Moso, can i be your friend!?
Damn he's such a Moso wannabe!