Sexual slang for inserting the thumb into a woman's vagina while simultanously inserting four fingers into her anus.
Bob: I heard you went home with Cindy last night
Jack: Yeah, and I totally gave her the Dirty Crab
by MrDee February 21, 2007
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An STD ridden vagina.
“Hey dude how was it?” “Never doing it again. She has a Dirty Dick’s Crab Shack
by CR1M1NAL7244 September 5, 2020
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