when a girl gets sooo aroused that one or more of her vaginal lips swells! and makes way to ur face hence getting a face full of pancake lips.
"man last night, jenie had a huge pancake lip!" i said fuck that and left.
"i broke up with this bitch cuz she slapped me in the face with her pancake lip after I told her i didnt want breakfast."
"i had an excellent continental breakfast when my girlfriend sat on my face with her pancake lip."
"IHOP aint got shyt on my girlfriends pancake lips"