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
The inner meat of the anus.
Ah god! Look at that goatse! you can see his assbeef!!
by BBN September 14, 2003