The only free and comprehensive online etymological dictionary of the Spanish language
tango (1) m. (Noun) "quoits"
19th cent. Name of a game played by players tossing discs at wooden stakes in the ground. A traditional game played throughout all of Spain; the earliest recorded name is "chita." From the Old Spanish phrase yo tango "I touched it." In Old Spanish times, when a disc successfully strikes the wooden stake, the player announces "yo tango."