people that often bum smokes, accept many gifts from you then harrass you about five dollars you owe them, people who hit two lines when you clearly made them one. also, people that never bring chicks to parties but will instead try their luck on yours.
Crumb snatcher is somebody who's always taking your seconds your leftovers. Someone who is waiting for you to leave them the bag after I smoke session. a jealous person who hates on you for your accomplishments butt is taking credit trying to steal your ideas and hard work for their own gain.
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.