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3.
1 : performing oral sex on a female after intercourse (submissive) :

2 : house keeping on a used pussy(fetish)

3 : the sloppy seconds of oral pleasure (desperate)
I'm on eat up duty tonight when my girlfriend gets home
by Completely Oblivious June 10, 2004
 
1.
To overwhelm someone with loving, but non-sexual, affection. The feeling you get when a little baby/adorable female does the cutest thing and you just want to pick him/her up and squeeze, cuddle, pinch cheeks, etc.
Courtney looked so adorable sitting in the fountain, soaked and upset with me cause I pushed her in, I jumped in and ate her up.
by The Madhatter May 01, 2005
 
2.
when a male/female licks a girls pussy...it is called eat up because it is like u r cleanin out a bowl removing its contents like using your tounge to remove contents
I ate up sarah like a bowlful of jello
by Anonymous October 15, 2003
 
4.
when a guy licks a girl's pussy.
I ate up a girl last night.
by jessica February 21, 2003
 
5.
phrased "eat up with (adjective)", Southern way of saying that one is that adjective to a high degree.
Her? Hell no, man, she's eat up with it. ('it' meaning 'ugly', the most common usage)

Well we gotta get something soon, I'm eat up with hongry.
by BooSheeShee January 18, 2008
 
6.
1. to believe unquestioningly

2. to receive enthusiastically

3. to bother
Those newbies eat up rumors about his hobby.
by The Return of Light Joker October 24, 2010
 
7.
When something looks bad. Ruff stuff.
There goes some ruff stuff. That girl's hair is eat up!
by Anonymous November 04, 2003