A grin given by the grinner to show or perhaps hide an inside thought or observation of their surroundings. The grin is usually obvious and not containable but more likely the grinner does not want to contain the grin therefore getting their point across without speaking. Sometimes you just can't say things with words so don a shit grin instead!
"Every time my boyfriend looks at my ass he dons a shit grin."
by timmyg July 3, 2012
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A smile that resembles that of the cheshire cat. Wide, and often a touch eerie.
He narrowed his eyes, a cheshire grin playing on his lips.
by lanthe November 10, 2013
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In business when someone smiles and shakes your hand assuring you that they have heard and will act upon your recommendation or concerns when in truth you have already been ignored and dismissed.
Manager Bob: "Our associates will not repond positively to further cuts in their benefits. I strongly recommend against it."

Executive Dick: (Smiling, shaking Bob's hand and massaging his shoulder)"Thanks Bob, we'll take that under advisement. You know our employees are our most important asset."

Dick then processes Bob's pink slip and cuts non-management benefits by 30%.
by Krace September 14, 2004
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For the hell of it, what harm would it do, we might even benefit from it. I believe originated from military-speak.
"For grins and giggles, let's click on this icon and see where it take us."

"Hey, we've got some extra time...why don't you turn down that road for grins and giggles and see where it leaves"
by Prof XXX January 1, 2004
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The Grinning Man is the name given to one or more mysterious figures that has become associated with various reports of paranormal activity. The grinning man has been reported to be wearing a sparkling green coverall costume with a wide black belt around his waist. He has a very dark complexion, and little round eyes real beady set far apart.
If you see this man get the fuck away from wherever you are and run as fast as you can.
Person 1:I thought i saw the Grinning Man when i was walking home yesterday

Person 2:Really?!???!?!?1

Person 1: I couldn't sleep at all last night.
by Redsnoopy November 16, 2010
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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 5, 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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