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1.
n. a crusty slut (can be used for both sexes)
Billy was sure to use a condom before doing the crabshack from the bar.
by Sandra Salsbury January 16, 2004
 
2.
The area around a female's genitalia where crabs would dwell. Also found in males. The place where Pediculus pubis resides. A home for pubic lice.
Shelly realized her bush had become a crab shack when the itching began.

Adam's crab shack was the greatest cock block to his sexual prowess

by jafus January 18, 2006
 
3.
a whore with Crabs. can be a male or female.
wow! Jens Such a Crab Shack

Holy Jeaues i went to blow paul and i found out he was a Crab Shack
by Big ole Tony September 30, 2008