The JOKER on poker cards means clown.

The two clown cards in the playing cards are the clown card and the clown card. The two clowns represent the sun and the moon, which are the most special existences in a deck of poker cards.

When playing cards were first introduced to the United States, there were no Joker cards. Manufacturers that sell playing cards will put a few additional billboards with the same texture as playing cards in a deck of cards, with Joker appearing as an interactive image with the advertising products or text.

Slowly developing like this, the trump card has become a role that can be replaced by any card. Therefore, in Landlords or some games, the trump card becomes any card.

Extended information:

Other colors of playing cards

The 52 genuine cards are divided into groups of 13, with spades, hearts, clubs, The four suits of diamonds represent each group, and the cards of each suit include 13 cards from 1 to 10 (1 is usually represented as A) and J, Q, and K.

The four colors have different names. The French call it "spear, heart, square, lilac leaf", the Germans call it "leaf, heart, bell, acorn" and the Italians call it "sword, coin, stick, goblet".

Later, based on the astronomical calendar, Westerners unified the contents of this card game into 54 cards in four colors. In this way, after a long period of evolution, they gradually become consistent.

Baidu Encyclopedia-Joker Card