When you're giving it to her from behind, pull out suddenly and drop kick her so hard your feet get lodged into her vagina.

Usually happens during a hate fuck.
Emily: DUDE YOU GAVE YOUR EX THE PASTY UNCLE?!

Zach: SHIT YEAH I DID. SHE'LL NEVER BE THE SAME AGAIN!

Emily: OH GOD SO MUCH HURT
by Trixster G. Rex May 15, 2011
Get the The Pasty Uncle mug.