as pertaining to fisherman:
the first examples of the term being used to describe other fisherman was in the early 1930's in the diary's of pissed off fisherman.
def. - A potlicker in
fishing is a man who is too
lazy to
go find fish on his own, so he looks for someone who is already on fish and then he moves into that man's spot. He potlicks, he's a lazy bastard who depends on what others find or leave him.