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1.
Browncappin is when you got to take a shit so bad that the round end of the turd starts poking out your asshole, usually accompanied by skidmarks in the underwear. I guess the first person seeing this happen up close thought it looked like there was a cap on the asshole. Some places in Maryland it is also considered a derogatory declaration aimed at someone. I mean, if somebody yanked down their drawers and browncapped you, how would YOU feel about it? Getting "browncapped" is plenty good reason to kick somebodys ass.
1) Man, I browncapped the ol lady last night and the ho threw a friggin lamp at me..... crazy biatch.

2) I was stuck in traffic this morning on the beltway for 2 hours. I was browncappin so bad that I had to pinch one off in a McDonalds cup.

3) Baby, keep on bitchin, you gonna mess around and get browncapped if you don't watch yo mowf.
by Knucklehead Steve October 10, 2004
 
2.
fuckin SHIT is about to come out of your aSSS!!
man that guy is fuckin brown cappin'!!
by yoa July 31, 2006