Stank ass pussy. Sweaty un-bathed vagina. Odoriferous and unkempt pussy. Smelly vagina that makes your eyeswater.
The dance floor at the club smelled of MoFoozy after Alex brought in those cheap Hoes. The office had a distinct aura of MoFoozzy after he had the new waitress upstairs.
Originated from mo fo or mo-fo. A goofy, stupid term meaning basically the same as motherf---er, but is used in a joking manner rather than an insult. A "friends" term.