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 brownmouse out and went to town.
noun. Basically, a rank fart. Most dangerous exposure is experienced in confined spaces i.e. a car, plane, cubicle, etc. Also a term used to denote serious disgust with the gasser. slang; brownhouse, brownhouser.
1. Dude! Who let out the brownhouse??!
2. Man, you reallyneed to keep that brownhouse effect to yourself!