Top Definition
A CB radio in the men's rest room. Something that doesn't exist in reallity but some men try to get women to believe in it just for fun.
John: sorry I was in there so long. I was talking on the men's room CB.
Kathy: There is no CB in the men's room.
Joyn: How do you know? Have you ever been in the men's room?
by Deep blue 2012 April 30, 2010

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