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1.
from the Latin form Slutus Lipus, meaning to be a foul-mouthed whore
wow, look at that skank over there swearing up a storm at that guy, what a slut lip.
by Muffin Pants Productions May 28, 2010
 
2.
Slutlips or Slut-lips
1) a name for a woman who uses her mouth (lips) to give sexual pleasure.

2) a term for the lips of a slut.

3) a term used to describe the red, swollen look that a woman's lips take on after she has been preforming fellatio.

1) "Thank you Slutlips, that was wonderful!"

2) "She has slutlips"

3) "After he came she licked her slutlips and smiled"
by marriedct May 19, 2008
 
3.
when you are making out with a guy and he bites your lips and the next day they are swollen and the blood vessels are broken
"Last night I was having a hot make out with Matt Rafferty and the slut lip he gave me made my lips look so full today!"
by Kelly and Claire October 20, 2007
 
4.
when you are making out hxc and the boy/girl bites on your lips repeatedly, causing tenderness and swelling come morning
holy moly! my slut lips look so full and luscious after my hxc makeout with matt.
by claire delaney November 03, 2007