Huffing is a rule used in some board games, such as Alquerque and traditional and informal English draughts (checkers).[1] By this rule, a player who fails to make a capturing move when one is available is penalised by having the piece huffed, i.e. removed from the board.
The rule is not used in competitive draughts, where failing to capture is simply an illegal move.
Huffing was probably introduced to prevent draws. In games such as draughts it is very hard to capture an opponent's last piece when you only have a small number of pieces left yourself.