look up any word, like fellated:
 
10.
what happens when you bite your lip under anesthesia
Owww...man I hope I never get a fat lip again.
by Raven January 01, 2003
18 39
 
8.
Fat lip or Fat lipping happens when a couple is interupted while making out, either by a room mate, a parent, etc, and one person gets hit in the mouth with an elbow.

Dude, I was totally making out with her, and then my Bro walked in and she totally gave me a Fat Lip


She totally Fat Lipped me.
by Mace and Kans July 10, 2008
7 23
 
9.
When you are going down on a chick and it's just a bit more than "ripe", so you throw a dip or chew in her box for a more acceptable flavor.
"I went down on this chick last night, the flavor was a bit off, so I gave her a Fat Lip of Cope to make it a bit more pleasing"
by Big Dippah March 08, 2009
12 29
 
11.
When a man or a woman, who has recently had a close encouter with posions ivy, performs cunnilingus on a woman. A sudden swelling in that region is known as the FAT LIP.

fat lip

This also works with heavy petting. Her labia lips will swell. A la, the fat lip.
Teddy came home with poision ivy last night, and gave Tina a fat lip.
by Kate1982 August 22, 2006
6 28
 
12.
When female genitalia becomes erectated like a male, except without a penis(replaced by vagina)
hey Latonya, do you have a fat lip, or are u packing?
by Goose September 29, 2004
10 37