look up any word, like dirty sanchez:
When the male pulls out the females tampon out for her cooter.. The remains of the bloody tampon turns brown and has a white tail. Hence the Brown Mouse
She said she was on the rag. I pulled that brown mouse out and went to town.
by J-MoneyNY February 22, 2008
the use of a tampon up the ass to catch any remnants of the ol' hershey squirts.
after frequent visits to the can, i just decided to brown mouse the remaining effort.
by just some guy August 20, 2003
a turd that makes an early escape when you have to shit and can't find a bathroom
Dude- I gotta go change,the brown mouse just crawled out of his hole
by bobbyt June 18, 2006