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3.
The recipient of sex given to him/her by someone who would normally consider that person beneath him/her, or otherwise sexually undesirable.
In Woody Allen's movie CELEBRITY, the Kenneth Branagh character gets tossed a mercy fuck by the starlet played by Melanie Griffith; they both knew there would be no second act, that it was a unique occurrence.

If someone hot wanted to go to bed with you, and you thought they were just doing it as a mercy fuck, would you go ahead and enjoy it, or would pride get in the way?

There is very little difference between a mercy fuck and a pity fuck, but they are not the same as a sympathy fuck, which has more to do with make-up sex. Mercy fuck is more like winning the sex lottery.
by al-in-chgo February 18, 2010
 
1.
fucking someone you really don't want to but you do it anyhow because you don't want to hurt their feelings.
even though I didn't like her I mercy fucked her so she wouldn't feel bad
by handle August 14, 2003
 
2.
Fucking someone because you feel deeply sorry for them. Meaning has also extended to include fucking because you feel sorry for yourself. Could be the perfect present for someone trekking the Sahara.
- So you mercyfucked Jody?
- Yeah, she's a munter and I had to have the lights out but she was so damn grateful, it was kinda cute.
by selmabouvier December 18, 2003
 
4.
having intercourse with another person that is very willing when you are very not interested. Mostly term used between gay men when a good looking gay man will show "mercy" and "fuck" an ugly man.
aslo applied to men and women.
Sam: Man, Karla is leaving his week to live in Texas.

Mark: You should hook her up and give her a mercy fuck. I heard she gives a good pepper shaker.
by superman90245 March 10, 2010
 
5.
The sex you give your partner when they are looking & feeling pathetic.
He had had such a bad week and I was really tired but I gave him a mercy fuck to cheer him up.
by Rakky4 February 04, 2010
 
6.
The act of forced intercourse for the sparing of life or dignity. Usually performed in crisis times by an uncontrollable male on a pleading bitch.
There were mercy fucks, there was blood
oh you shoula been there by my side.

I offered her the option of a mercy fuck instead of execution in order to spare her life.
by dizzy dave April 29, 2005
 
7.
Being with another in the most intimate way validates our experience as humans...without condition.

In that moment, I am in love with the essence of all that we can be.

It is not about orgasm, but about connecting....
I loved her for who she was in the moment, not just a mercy fuck.
by Zenith2 December 03, 2006