We often hear people say "oh that fish got so lucky" or "I bet that fish good"... and often people are calling someone a fish because of a suckout, misclick/bad play, etc etc, when that person could be a habitual winner or loser, but played bad that one hand.

And sometimes people refuse to accept that *gasp* they were outplayed on a hand... instead saying something like "oh, the fish got lucky" or they are a calling station (how could they call my 50 dollar bet on a A high flop with KK? Or maybe the person knew how I bet when I flopped an ace on a flop and when I didn't)

So, I'd like to see if we can some general criteria we can come up with. Can we determine if someone's a fish based on one hand? 5 hands? 10 hands? Entire session?

Is a fish someone who is loose pre-flop and passive on all streets? Or someone who chases bad odds every hand? Someone who makes awful bets? Someone who never makes a bet? Someone who is a nut peddler? Someone who raises with trash and hits? Someone who doesn't know when to stop firing bullets at a bluff? Is it the habitual loser? The maniac? The degenerate?

I'm curious to everyone's thoughts