This phrase is usually used as an interjection to or about another. A person is so frustrated that this is the only thing that they can say in response to the dumbass activity you have partaken in.
Guy 1: "Yo I just hit your car coming off that exit!"

Guy 2: "YOU DUMB-TITTY!!"
by Lucy's Dad February 2, 2008
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This phrase is usually used by a person that drives an Explorer. This person is so frustrated that this is the only thing that they can say in response to the dumbass activity you have partaken in.
Ryan: "Yo Brian I just hit your car coming off that exit!"

Brian: "YOU DUMB TITTY!!"
by Mike LaVecchia January 24, 2006
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