I’ve heard “Hit and Run”. Also, the rathole thing. In poker specifically, “ratholing” is removing money from a game, but continuing to play. Sometimes players who are up will leave the game, then come back in at a lower buy-in, “locking in” their profit. This is also called ratholing and they may be required to come in for the amount they left with, unless they have been gone a designated amount of time.
These people usually don’t even want to be identified, much less labeled. Poker players who consistently win may be referred to by staff as “serious” players or even recognized as pros. However, it’s considered gauche for staff to comment about players’ play or results. Depending on circumstances, it may even be cause for discipline. “Rounder” is a term that is somewhat dated. In years past it was a serious player or pro that “made the rounds” of the regular games.
Aggressive underdogs might be described as “maniacs”, though if they are throwing chips away, while maintaining a cheerful attitude, they may be described as “throwing a party”. On the other hand, a player who never gives action without holding the nuts may be described as a “nit” or “rock”. Meticulous players who are happy to get rich slowly with minimal risk (as opposed to people trying it make a big score) are sometimes derided as “grinders”.
4 & 5) “Choking” is common at the poker table. If this is due to an emotional state, it is usually referred to as “going on tilt”. Tilt is usually a result of anger at the vagaries of luck or one’s opponents or fear of looking weak (especially if one IS weak). But, some just get more reckless after winning, when they have more chips with which to make foolish bets. Other people just play like they are mad at their money.
“Donkey” is a rude term for generally poor players, essentially synonymous with “fish” or “rube”. However, it should be noted that many serious players and professionals avoid these terms, even in jest. If someone overhears the more magnanimous sounding “producer”, they are much less likely to take offense. And the pros know that players with good funding and bad judgement are the foundation of the poker ecosystem.
Source: was a poker player, dealer, and pit boss for years. Also was Dr. Todd Fuhrman’s “technical consultant” for his book on ethics in the poker community, good read, which I recommend.