It is when a guy busts on a cold bowl of Mac & Cheese after plowing someon & it is usually eaten by the person that was fucked.
Guy #1: "Hey Apolo, Ramses told me you fucked that girl?"
Apolo: "Not only did I fuck her bro, I gave that bitch some Faparoni & Cheese!"
Guy #1: "You're the sickest"
cheesefat is a fat that cums out of cheese. cheesefat can be made by stewing justin bieber's head in a non-stick pan for a couple of milleniums at least. you can find cheesefat in the caves of the retarded inkblob mountains, find a mutated jabowocke's cave then search the whole cave.