Rathole
To rathole is to take chips off the table during a cash game, or to leave after a winning session and return with only a small buy-in. In many places, it is against the rules.
The simple explanation
If you win a lot and then quietly take some chips off the table, you are ratholing. In some games, if you leave and come back later, you must buy in for at least the amount you left with. This is called a no-rathole rule.
A closer look
The rule against ratholing protects the other players: a winner has to keep his chips in play, so the others have a chance to win them back. 'Going south' is the same behavior. A player who wants to take money off the table should leave the game and cash out. Even where it is legal, it is often considered bad etiquette.
A practical example
A player wins $500, leaves and returns with only the minimum buy-in. In a no-rathole game, he must buy in for $500.
Full explanation
To rathole is to take chips off the table during a cash game, or to leave after a winning session and return with only a small buy-in. In many places, it is against the rules.
To rathole is to remove chips from the table, or to return with less.
It is prohibited in many rooms.
Another name is going south.
No-rathole games require you to come back with the same amount.
Alternative spelling: rat-hole, rat hole