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"Big, dirty, slut bag." Refers to an unappealing female, usually of a large frame and always promiscuous.
Person x: "Look at that grenade all over that dude!"
Person y: "She's a total bdsb."
by gardzi January 19, 2011
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Acronym for "Big Dirty Slut Bag". Used to describe an unappealing female, usually of a large frame and fairly permiscuous.
Bill: "Hey Fred, word has it that you tried to nail Mandy last night."

Fred: "Bitch, please. She's a BDSB, I wouldn't touch her."
by LShunter April 20, 2006
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