A big purple "thing" used as a mascot by McDonalds, which is actually a beetroot milkshake who was once an evil fiend who STOLE milkshakes and had multiple arms.

Grimace, that crazy beetroot!

grimace by Bail February 5, 2004

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Grimace

the annoying purple monster from mcdonalds, a pained expression on one's face or a creepy guy named Chris.

Joel: did you see Chris wearing that tight shirt?
Anne: Yeah, made me grimace.

Grimace by Joel Herren June 4, 2005

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grimace

an insult directed at a big dumb guy.

Daaamn Grimace! get cho big ass out of here!!

grimace by Crazy68 August 24, 2009

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grimace

A large, pear-shaped purple McDonald's character...but he is also so much more...

Nothing can stop the Grimace!

grimace by Grim-Ace February 15, 2003

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