when a guy is having sex with a fat girl and the guy takes a frozen patty and puts it between the gilrs butt, then the guy jizz's on one side of the patty making it look like cheese. then the girls butt are the buns, and jizz is the cheese.
A pussy that smells so bad it passes as an asshole. A stinky pussy. A pussy one is about to eat until they get a whiff that smells like feces...cunnilingual abort mode is instantly instigated.
Max: "I was as hard as a rock and went down on her, it was so dark I thought I was accidently tonguing her ass until a car went by and the lights shone on us and I could see that it was her pussy that I was licking. She had a serious case of anal muff! I continued anyway 'cause I was so horny!"
Scott: "You scare me dude!"