What is the meaning of Tiddlywinks?

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.

Especially in the form to play tiddlywinks: a meaningless or unimportant activity.

plural of tiddlywink

third-person singular simple present indicative of tiddlywink

Source: wiktionary.org