Meaning

noun a game in which players try to flip plastic disks into a cup by pressing them on the side sharply with a larger disk

originFrom tiddlywink + -s, possibly from tiddly (“(informal) little, tiny”) + wink (“blinking of one eye”), perhaps borrowed from tiddlywink, etymology 1 (“unlicensed beerhouse or pawnshop; game played using dominoes”, etc.). The game was patented by a British bank clerk, Joseph Assheton Fincher (1863–1900), on 19 October 1889, and the name Tiddledy-Winks trademarked by him the same year. Tiddlywinks…

Etymology from Wiktionary, CC BY-SA 3.0