A person(s) whom can be identified as a Muff; A hairy vagina; Idiot.
That kid is a muff cake!
1. Looks like a muffin. Tastes like a cupcake.
2. Extremely hairy vagina.
3. A hairy muffin top. Usually found on males.
"Is that a muffin or a cupcake? I can't tell."
"Dude she had a major muff cake going on down there!"
"Did you see Andy's hairy belly fat hanging over his pants? what a Muff Cake!!"