look up any word, like rimming:
 
3.
Having sex with someone for the purpose of getting back at another person. Also used as an insult refering to another's lineage.
You look like the product of a grudge fuck.
by snapp January 19, 2004
 
1.
Having sex with some to get back at someone else

or

Having extra rough sex with someone as a means to get back at that person
ex. 1: Yea, i grudge fucked your mom on you...

ex. 2: That bitch was mean all day, but she wanted sex later that night. So i grudge fucked her.
by Rickbauls January 24, 2005
 
2.
Hot, but mean-spirited, almost violent sex used to punish someone. Sometimes it's used to get back at a significant other. Sometimes it's used to make the significant other wake up with scars, bruises, and/or the inability to walk straight.
She's hot but annoying. I wanna grudge fuck her into traction.
by D.S.Machina October 24, 2006
 
4.
Having hard, hot, wild, violent, satisfying sex with someone (else) to exersize the deamons of a former BF, GF, or lover you just broke up with.
I need a good grudge fuck to get over her.
by JessAstroman July 15, 2006
 
5.
Either:

1: Fucking someone who you really dislike but would like to punish through sexual intercourse (often a celebrity and often in an aggressive manner).

Or:

2: Fucking someone to get back at someone else (usually someone related through blood, friendship, work or sexual relations).
Grudge fuck example 1:
Delta Goodrem
Bono

Grudge fuck example 2:
Your ex-girlfriend’s really hot sister
Your boss’ husband
by demo demo May 03, 2011
 
6.
fucking somebody you really don't like that much so you fuck the dog shit out of them.
i can't stand that bitch melanie so i called her up thursday for a good old grudge fuck just because i had some frustrations to take out.
by filmzillz October 24, 2009
 
7.
Not quite rage, not quite passion, but a whole lot of nasty sex. The kind of sex you give to your partner when something about them pisses you off, but you still want to fuck them anyway.
Guy 1: "I found out Sarah was sleeping around on me."

Guy 2: "That sucks! Did you dump her?"

Guy 1: "Sure did, but I grudge fucked that slut first. She won't be able to walk straight for a week."
by Larny123 March 03, 2012