Mud vein

Anal cavity used for sexual activity.

Bitch's sloppy box was so big, I had to toss it up her mud vein for some friction.

by jdhayman June 05, 2007

Mud-Vein Technique

A martial art technique pioneered by The Justin, which involves shoving your fist so far up someone's ass, that you are able to use two fingers to poke their eyes out from the inside. An ultra-violent method of creating good fun.

You best check yoself before I bust out the mud vein technique on yo ass.

by ~G~ October 22, 2004