Tiddlywinks is a game in which the players try to make small round pieces of plastic jump into a container, by pressing their edges with a larger piece of plastic.
2. countable noun
Tiddlywinks are the small round piece of plastic used in the game of tiddlywinks.
tiddlywink in British English
(ˈtɪdlɪˌwɪŋk), tiddleywink (ˈtɪdəlɪˌwɪŋk) or tiddledywink (ˈtɪdəldɪˌwɪŋk)