Top Definition
A discolouration of the soap on one's hand when washing ones ass. Usually caused by not wiping properly after one has had a shite.
Duder: DUDE! I got brown soap yesterday!
DUDE: What the hell is brown soap?
Duder: It's just shitty soap you get when you wash your crack after not wiping...
DUDE: THAT'S FUCKING SICK MAN.
Duder: DUDE, Whatever, it tastes better like that anyway.
DUDE: O_O
by GeorgeBizzle October 18, 2007
7 Words related to brown soap

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