gap fuck 

When a man and woman are naked, they are both standing up, the woman has her thighs together, and the guy fucks the gap at the top of her thighs just below her snizz. It works facing each other, or the guy behind.

My girl was on the rag, so I gap fucked her last night.

gap fuck by -hef- September 16, 2009

Fuck Gap 

The space between a girls legs when standing straight up between her thighs that is typically measure in the amount of fingers that can fit between it without touching the thighs.

Damn look at the fuck gap on that girl. I'd like to get it in.

Fuck Gap by Bewb1 June 14, 2011