Grinfuck 

From the song, Grinfucked on The Fury of Our Maker's Hand by Devil Driver. Meaning to screw someone over all the while they believe you are their friend.

The way your boss took the credit for your work all the while telling you that he was going put you up for promotion. You just got grinfucked hard.

Grinfuck by Hydroeric April 26, 2006

Grinfuck 

The act of slitting somebodies mouth open from side to side (IE chelsea smile) And then repeatedly fucking the gaping wound.

When I grinfucked Tom.

Grinfuck by Candyclub4kids July 25, 2011

Grinfuck 

The act of making a "WHOO" sound really loud and its sorta like a death metal growl.

"Hey grinfuck that guy!"

-innocent guy walks by-

"WHOO!!"

-guy gets scared runs away"

Grinfuck by Mr.Sexy September 16, 2007

grin fuck 

grin fuck (verb) - a sales technique in which the salesman smiles profusely while delivering bad news. Since 80% of human communication is based on body language alone, the simple deception of grin fucking is often enough to prevent the victim from fully conceptualizing the bad news until later, after they've already agreed to the deal.

Note: the best defense against grin fucking is to call attention to it by casually asking the salesman why they are smiling.

Salesman <while grin fucking the hell out of you> We had to order a part from overseas, so the invoice came in $500 over the original estimate.

You <after sipping your coffee>: Why are you smiling? That sounds like bad news to me.

Salesman <suddenly befuddled>: Oh... no reason. I guess I'm just in a good mood today.

You: Okay, well, since I never approved the additional costs, what discounts can you provide to bring us back closer to the original estimate?

grin fuck by Ggggggaaaaaaaaaaaaaaaa September 13, 2011

Griffucker 

Someone who fucks the Griffin statue at William and Mary. The statue, a life-size bronze model of a griffin (half eagle, half lion), has a very prominent cock and balls, making it ideal for sex. This includes all forms of sexual activity, from ball fondling to handjobs to blowjobs to full-on vaginal or anal sex with the Griffin's metal cock. Some students put a condom on the Griffin's cock, while others prefer to take it raw, accepting any and all risks.

This term was coined by the campus satirical newspaper, the Botetourt Squat.

Katie: Hee hee hee guys, I rubbed the Griffin's balls last night, I guess I was a little drunk...
Leah: What do you mean, you rubbed his balls? You literally took his entire cock in your pussy!
Katie: Ha ha, either way, I'm a Griffucker!

Griffucker by naked streaker August 7, 2019

grinfucking 

grinfucking - the act of being (pretending to be) really nice to someone's face and then turning around and stabbing them in the back

past tense: "grinfucked"

related: "grinfucker" - one who commits such acts

Laura told me she loved my outfit, then told Mike I dressed like a whore; I can't believe she grinfucked me like that. What a grinfucker.

grinfucking by ckd December 5, 2003

grinfucked 

When you are "fucked", or taken advantage of, by a lie told from a grinning mouth.

The smiling used car salesman using lies, convinces a customer to buy a car that breaks down a week later. The customer was grinfucked.

grinfucked by Brad Johnson June 18, 2006