This is when a man is about to orgasm. He pulls out, his girlfriend caps the tip of is penis momentarily with her hand. This builds back pressure. When she releases the cap he will shoot his wad very far.
by Brown's Man June 7, 2009

by Joe August 25, 2003

"Bust a cap in yo Azkaban" is a threat that is simulteously a Harry Potter reference, and a Harry Potter in the Hood reference. "Azkaban", in this phrase, is a play on "ass" or "azz".
by herr0prease April 11, 2010

The act of sticking a soda bottle lid in someones rectum, and putting the tip of the bottle up the anus. Turning the bottle till the lid is firmly tightend will conclude the act.
by jr and jr July 2, 2011

by wonderland291 May 20, 2010

The resultant poop on the tip of one's penis, following the act of anal penetration. Sometimes abbreviated to PRBC.
That girl needs a series of enemas, you should have seen the ridiculous puerto rican baseball cap I was wearing after we boned in the butt.
by The Lexipornographer August 23, 2011

by hngsolo November 16, 2010
