The opposite of the White Man's Overbite.

The goofy smile on a nigger's face when he is dancing at a club with an overweight white bitch.
Onlooking negro #1 "Hey, check out Tyrone on the dance floor!"

Onlooking negro #2 "Playa's Nigger Grin is makin' all those white craka's go crazy!"

Onlooking negro #1 "Wanna go steal a TV?"
by BiggestMOC December 03, 2007
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A clueless, Manic-depressive moron who is always "in your face". This is one of those guys that you carefully try to avoid at social gatherings because they have no social grace. They will babble on about how great their life is one minute and how much it sucks to be them the next.
They want to take on the world, but then they don't have time for it. They get mad at you when you remind them of their commitments, as they've moved on to bigger things in their head.
The Big Grin cornered me last night and told me all about the big promotion he got at work, when I agreed that his life was good he told me about the long hours and how it sucks to be him.
When I remined him of the paperwork he had due, he got angry at me because he had since gotten bigger and better things to do.
by Stan West May 23, 2006
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(coined by Antenna Wilde)

1. noun. A twisted, irregular vagina; misshapen, lopsided or irregular in general. A knotted smile.

2. adverb. A vagina betwixt.
1. She spread her legs with a knotty grin.

2. Her knotty grin betwixt me.
by Antenna Wilde April 05, 2008
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More commonly referred to as a smirk, a douche grin is a smile that expresses scorn, smugness, etc. Often performed by smiling on one side only. The douche grin was named so because douchebags are inclined to abuse smirking.
That guy's douche grin makes me want to punch him in the face.
by Broski O'Bronald January 21, 2010
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Dead. Grinning at the lid of your coffin, as a result of the taxidermist's effort to make us look 'at peace'.
"What torturous eternity, left grinning at the lid".
by RaZoR_RaiN December 31, 2009
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The seemingly permanent smile that someone has after spending time with someone that they are very fond of, or doing something that they enjoy.
Kathi leaves work everyday with a Perma-grin. She must really love her job!

Look at the Prema-Grin that Christina is wearing this morning! I wonder who she was with last night?

by AnthonyOhio August 02, 2007
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Smiling all in a person's face, trying to gain their favor. Usually a person that is skinning and grinning is being fake or phony, flattering, or flirting. Trying to impress or befriend a person. Often they don't really like or respect the person and since they aren't being sincere, they are just skinning and grinning.
person 1: My boss always gives me so much more work to do than everybody else.
person 2: Really? Why do you think that is?
person 1: I don't know, probably because I'm not always skinning and grinning in his face like the other people there.
by xXSerendipityXx December 12, 2008
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