1.The facial expression used when a person is in deep thought about something mischeivious.

2. A term for hanging out
Ramin: "What are you guys up too?"
Pollard: "We're gunna meet up and grimace i'll tell you fucking what"
by Kurdumbri February 21, 2011
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A fat chick that wears purple sundress or any other "Grimaceesque" type clothing (anything purple, even shoes)
Jamie shouldn't of worn that purple dress, she looks like a God damn Grimace!
by P.O.P. May 20, 2010
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a Grimace is a fat african american girl who comes to parties and tries to make out/hook up with anybody and everybody (male and female) at that party. It is a comparison to the McDonald's character Grimace.
John: "Dude how was that party last night?"
Dave: "It was fucked, some Grimace showed up."
John: "EW MAN. you didn't make out with her did you?!"
Dave: "Fuck no dude, I let her have some random drunk chick."
by Mohammed Abdul Jabar January 6, 2011
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Grimace: Choking a girl during sexual intercourse. The name however is not derived from the face made during the act it is however derived from the fact that the girl may or may not turn purple which would cause her to resemble the McDonald's character Grimace. Variation: Uncle O'Grimacey: Choking a girl of Irish ancestry during sexual intercourse or the chocking of any girl on St. Patrick's Day.

Warning: The Grimace and Uncle O'Grimacey are not meant to be fatal but rather to enhance both partners experience's.
After the movie i took sally back to my place where i promptly gave her the grimace.
by J.Gannon&C.Paul February 25, 2008
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A Grimace is that fat purple shit that hangs with the hamburgler.
"Holy cow mommy, did you see that fat purple shit?"

"Yes, thats a grimace, he chills with the hamburgler"

"Grimace looks like a oval mommy, i'm scared lets never get another happy meal again"
by Mason Beveridge June 15, 2004
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The fucking most bad ass dude alive. He drives a frikin cement truck and he's a gum drop on roids.
Grimace is the coolest dude alive.
by Scott Taylor March 21, 2008
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Grimace A Nick Name for a thick Penis
Her: Why did you Name your Penis Grimace?
Me: Because It's a short Fat Purple Muther Fucker, like Grimace
by ricardoduck March 9, 2008
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