Bidding is the process in many card games, such as Skat, Pinochle, Binokel, Bridge, Solo Whist, Préférence, L’Hombre, Bauernschnapsen and most types of Tarock, whereby players vie to be able to specify the type of contract, the trump cards and/or to be able to pick up a set of face-down cards known variously, for example, as the talon, skat, dabb. Wikipedia