etwas auf die lange Bank schieben — To push something onto the long bench. It means to postpone it. The etymological dictionary cited by DWDS traces the phrase to the 15th century, when court files were put into long chests for storage.
die Hängepartie — The hanging game. In chess, it is a game that is stopped and continued later. In politics, it is a matter that stays open for a long time.
das Zeitspiel — Playing for time. In football, it is an unfair way to protect a lead. In politics, it is waiting that someone uses on purpose. Opposition wirft Koalition Zeitspiel vor. The opposition accuses the coalition of playing for time.
All three words are critical. Time to think is welcome, but time used as a tactic is not.