Bumhunters in poker are called a category of players who prefer to sit down at the tables with weak players, referred to in poker jargon as fish.
Bumhunters are looking for weak players and only if they are available sit down at the gaming table. Hands where only strong opponents, whose level is not lower than the “hunter” take part, do not arouse interest among such players, so they quickly leave unsuitable tables and go in search of victims.
Bumhunters often take part in heads-up cash games, as opposing the fish, they practically do not leave him a chance to save the bankroll. Do not think that only the middle peasants resort to such tricks. In fact, even some poker players with big names periodically go hunting for fish. Such actions allow them to stabilize the state of their own game bank.