fish--> "like shootin' fish in a barrel"

Basically anybody who's easy money. I don't use it too often, not specific / derogatory enough. I use:

Donk- standard noob who plays too many hands, and is aggressive with crap / stacks off real easy (like a donkey; loud and dumb)

Rock- ("like trying to squeeze blood from a rock") aka. the nit / the mouse. Basically a vagina in the form of a card player. Is so scared, won't bet anything except for the nuts /near nuts. Boring player, easy bluffing target.

(calling) Station- pretty self-explanatory

Luckbox (is really lucky / on a hot rush of cards, implies that the player's success has nothing to do with his skill, which is poor). I like this one b/c luck rhymes with f*** and so the insult sounds good.

ATM / cash machine / broken ATM. This term is just pure genius.