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1.
When a woman fucks a male lover before having sex with her boyfriend to prepare her vagina for the main intercourse.
I thought I was going to have a threesome with my friend and her boyfriend but it turns out she just wanted to use me for some pre-fucking. I ain't no one's live dildo!
by MaKyla's Pre-fuckbuddy September 22, 2011
 
2.
this is when you court a girl or otherwise persue until the point when you know she will have sex with you then you lose interest.
the other day tiffany was going to fuck me. i didnt even want to do it anymore when i knew i could. prefucking is the best.
by foreskinfury April 04, 2012