My Donkey Poker books aim to teach players how to crush the low stakes no-limit hold’em games commonly found in Las Vegas. I define a "Donkey Game" as the typical $1/$2 or $1/$3 Vegas game, and often the $2/$5 games found there. The term also applies to many other card rooms around the world, especially for their smallest games.
The key aspect of a Donkey Game is that it is populated mostly with "Donkeys," but to be clear, I don’t consider a Donkey to be just a bad player. Rather, I define such a player somewhat differently.