to play a higher card than one previously played to the same trick (usually applied when a higher card is played directly over an opponent's play).

To play a domino tile that converts the exposed end of the skeleton to hide a suit which your opponents have played. This is a defensive move to aid your partner who may not be able to play a tile of the suit preferred by the opponents.

be responsible for guarding an opponent in a game

Remaining close to an opponent.

to have larger number of chips that some of your opponents.