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A smile with an attitude.
I grinned and shot him in the head.
grin by grin March 5, 2004
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."
Grin by 4 LIFE May 24, 2013
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
grin by taity September 8, 2008
an acronym for the set of technologies: genetic, robotic, information & nanotech.

the convergence of theses technologies into a single technology.
investing in GRIN stocks is a sure thing right now.

our children will need access to grintech if they are to compete in a global economy.

GRIN technologies are the modern day 4-horseman of the Apocalypse.
GRIN by g.SPIN December 5, 2010
The retarded type that can do nothing but smile. Such as the Wal-mart greeters, or that wierd old lady that lives down the street.
"Dude, he fucking walked into that wall. What a fucking grin."
Grin by tonp April 1, 2009
when someones pants are not fully up and they bend over and thier bum crack "grins" at you
wow you seem happy today because your certainly grinning at me
grin by aidyaid87 October 25, 2009
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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