muffin flap

the burnt flap hanging off the side of a stale muffin; often used as an insult to people who are hella crusty

guy 1: dude that girl is sooo hot
guy 2: yeah but she's crusty AF
guy 1: dang it
guy 2: I hate it when girls turn out to be muffin flaps

Muffin flaps

Labia Majora.
Interchangeable with “pussy lips”

Barbara isn’t wearing any panties and I caught a glimpse of her muffin flaps