whenn you have large hairy moles around your poop shoot that resemble taco beef.
Dude!! look at that bitches ass beef! ahhhhhhh
by K&T&J July 31, 2006
An external, exposed part of the rectum. Usually occurs as a result of anal sex with insufficient lubrication and a quick removal of the penis or other object.
I had my penis in her butt and she pulled away too quick. Now she has assbeef.
by Dan September 10, 2004