noun

• (tiddlywinks, also attributively) A competitive game in which the objective is to flick as many small discs (each called a tiddlywink or wink) as possible into a container (the pot) by pressing on their edges with a larger disc (a shooter or squidger), causing them to jump up from the surface on which they are placed.
• (figuratively) Especially in the form to play tiddlywinks: a meaningless or unimportant activity.