skully · noun1
From skull + -y; (game): from the skulls which are drawn around the center square in the game.
skully · noun2
From skull + -y, it being a cap that goes over the head (skull).
Etymology from Wiktionary, CC BY-SA 4.0.
skully
Today it means: A street game in which players attempt to flick caps into a series of squares drawn on the ground. Full definition →