From Wiktionary, the free dictionary
From skull + -y; (game): from the skulls which are drawn around the center square in the game.
skully (countable and uncountable, plural skullies)
- (countable) A knit cap.
- (uncountable) A street game in which players attempt to flick caps into a series of squares drawn on the ground.
- Synonyms: skelly, scully, skelsies, skilsies
