The toothless look on the face of an old person.

Further used to reference anything old.
Grandma is really grinning today.

By the time this pizza arrives I'll be grinning
by donjon May 04, 2007
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Slang for marijuana (usually laced). A word used primarily in the West Coast in the 1990's.
See also water or wet.
"I threw away all my grin... and I feel strange..." --Sage

"What's your poison? Grin or gin?" --Carl Johnson

"Man I couldn't find that wet I buried, so I'm making my own. It's easy, fool!" --Ryder

"That ese put dust in my grin."
by 4 LIFE May 24, 2013
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A play on words of the Pittsburgh expression "Yins" and the bud expression "Greens." Mostly exists to make fun of pitssburghians.
Yo can I get Grins on this bowl?
by Rocky Lebron June 17, 2010
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To grin is to put on a big smile.
A girl at the bar , grinned at me. But I was wrong to think that I have any chances of getting her as she already had a boyfriend.
by Dixnory May 27, 2017
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smile so sickly sweet it make onlookers through up on site, or passing meat heats punch the grinning idot!
look at the grin on that bloke he looks like hes just got a new girlfriend
by taity July 26, 2006
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An irritating, cringe-worthy substitute for a "smiling" emoticon. Used on internet message boards. Very often follows a very weak attempt at a joke.
The trees might bark at you, I suppose *grin*
by sooth July 12, 2005
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