Joker (playing card) 6 Jokers (3 different pairs) in a 52-card French deck. German Rummy uses 2 packs of French playing cards, with 3 Jokers per pack. The Joker is often compared to "(the) Fool" in the Tarot or Tarock decks. They share many similarities both in appearance and play function. In Central Europe, the Fool, or "Sküs", is the highest trump; elsewhere as an "excuse" ("L'Excuse") that can be played at any time to avoid following suit but cannot win. Practitioners of cartomancy often include a Joker in the standard 52-card deck with a meaning similar to the Fool card of Tarot.
Deuce (playing card) of a boar on the playing cards was simply a pictorial illustration of this etymological development. According to Marianne Rumpf, the name comes from a Baden dialect in which the "S" is spoken like a "Sch" and the word "Dausch" is used for a female pig or sow. The Brothers Grimm state in their dictionary, that the word "Tausch" was used for the four cards. Perhaps the word "Dausch" inspired card artists who illustrated the free space under the coloured symbols with a sow. The language of card players may also have given rise to the expression "Däuser" (also "Deuser")