to look at someone with a dirty look; common term in 1990s Detroit, Michigan.
"I was walking down the street, and some girl was grimming me like she had some kind of attitude or something."
by J. Johnson February 27, 2004
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Something that is proper nasty, mainly used when talkin about girls or gashes
Menzies: "Cuz did u see that girl?"

Calum: "yeh man! proper grim!"

Menzies: "Innit rude boi"
by Chris Menzies June 06, 2006
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refers to an ugly chick, or any other unpleasant or tedious task. used colloquially, one could say "let's get grim," or "let's grim up." used in this sense, the whole phrase could be used in a situation where you have to fuck an ugly chick, otherwise known as "man up and do it, pussy." It could also be applied to doing any unpleasant or tedious task or simply getting serious about a task.
"i need to grim up and do this chick."
"let's grim up and finish this project."
"hahahaha, good joke. but let's get grim and do this."
by Mohungus January 03, 2006
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synonymous with revolting, disgusting, ugly, gross..
Man did you see that girl, she was grim.

Someone hasn't flushed the toilet for weeks, it is grim in there.
by Anonymous January 28, 2003
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one of the most feared outlawed gangs in kenya
that mans son was killed by the grims
by kilonzo March 25, 2010
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(pronounced as: Grr and Rim put together) It means ugly or an ugly person. It can be used as a Noun or Adjective.
Mom these clothes are grim.

OMG look at that grim!
by Kendal58 November 01, 2010
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