zipper fuck 

to insert your penis on the zipper and zip up, causing massive devastation to your penis.

Dude, I was bored one night, and saw my zipper jacket on the floor. SO I decided to zipper fuck it. Not a very good idea beacuse now my dick looks like a pot-sticker.

zipper fuck by Zucchini January 16, 2008

Zipper Fuck 

Fucking somebody without expectations of dating, but with numbers and contact information being exchanged (making it different than a one night stand). Random sex for fun, but not having any regrets.

Last night I zipper fucked this guy....

Zipper Fuck by Lanen September 19, 2006