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1.
A crabsnatcher is someone who snatches crabs off pubic hair, for sport or pleasure.

Could also be a person that has uncanny abilities of diving into water , generally with a sandy bottom, and manually yanking crabs from other peoples crab traps and/ or cutting their crab pot's line so that only they will successfully pull crabs from the water.
That chick he met is nasty; he will be a crabsnatcher before the nights over.

The crabsnatcher ruined everyones fishing...i assume it was the guy in scuba gear that came up with a bunch of crabs, despite having no crab pot.
by crabsnatcher February 17, 2011
 
2.
A snatcher of crabs
Mysterious Girl:NO ITS CHADWICK

Kiran: So what is it, like crabsnatcher or something?
by Ben Perkinss January 01, 2009
 
3.
The act of having sex and snatches crabs for a crabby patty party.
Neighbors who are also crab snatchers for fun and women decide to have a crabby, firepit party.
by Ms. Bon Jovi August 31, 2008