Grimfuck 

When someone you know is about to have their life permantly, or for a very long time, ruined and you do nothing to prevent it or if anything you encourage it.

Girl: Oh I'm really happy
Guy thinking: Haha, her new friends will grimfuck her very badly

Grimfuck by Toothpaste Salad January 21, 2009

Grimfuck 

When someone nods yes with a smile and then turns around to ignore everything they just agreed to do.

BOSS: Hi Bill! You get those TPS reports filed by Friday. We have a serious audit coming up next week and need it done.
BILL: Sure thing, boss! *smiles* *grins*

1 week later:

BOSS: Bill? Where the fuck are the TPS reports?! We're being fined by the SEC! You stood there and grimfucked me last week!

Grimfuck by Protonix September 3, 2016

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

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

gripfucking

When one vigorously goes at it with another in the bedroom. Very similar to on the nature shows when the lizards clasp each other with their paws and go at it like there’s no tomorrow.

“So get this, I was gripfucking this chick last night and my shit is so sore”

gripfucking by MinkyManlyOk January 16, 2021