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A mythical creature that lives in a cave on a mountain. This may used as an insult towards someone, if the person is very aggressive and has no good morals or someone who likes to steal other peoples things.
Aidan: Hey Kelsey, why did you steal my shirt and my 10 bucks?

Kelsey: Because I'm a grinch.

Aidan: Yes, you are indeed a grinch.
by oceangang69 October 11, 2014
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A substitute for the word "bitch", typically used in front of elders such as grandparents, parents, etc., as well as young children.
"Dude, your girlfriend is a major grinch. You need to drop her."
via giphy
by jonahraleigh April 20, 2017
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Slang word meaning cunt from the How I Met Your Mother episode: How Lily Stole Christmas.
Ted: On Marshall's answering machine Hey, Marshall. Still moping on the couch about Lily? Forget about her. You need to get over that Grinch.
Older Ted: Flashback But I didn't say Grinch. I said a bad word. I said a very, very bad word...
Ted: Oh, fudge.
Older Ted: Flashback But I didn't say fudge.

Ted: She took the decorations? That Grinch!
Older Ted: Flashback That time I really did say Grinch.
by Mike Stark June 10, 2014
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4
Grinch (which is a hairy creature) is a word used to describe a hairy/swetty/smelly vagina.
Her Grinch vaginacuntbeavermuffmingetwat smelt like a fish counter on a hot day.
by V--dog October 03, 2010
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De grinch verpest kerstmis. Niet te verwarren met een snitch.
"Oh nee, de grinch verpest kerst!"
by Skere December 03, 2015
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Verb, to ruin everyone else mood, much like when the grinch stole christmas. See also, grinching
Yo man everyone's having a good time, why are you grinching?
by kayline87 October 13, 2008
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1. to gripe or complain about stuff peripheral to holidays (e.g. traffic, crowds at the mall, etc.)

2. a person who incessantly does the above, year after year
Don't be such a grinch!
by foltor August 08, 2005
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