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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
 
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
 
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
 
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
 
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