Brown Muffin
Some who eats the shit out of your asshole while it is hanging out such as a turtle head.
Man your breath smells like shit did you get a brown muffin.
brown dusty muffin
Sprinkling brown sugar on a girls face while receiving a blowjob. Sugar can be literally brown sugar or brown from other sources.
I was in the kitchen and gave some girl the brown dusty muffin because I ran out of powdered sugar.