Green’s Dictionary of Slang

scull n.¹

a one-horse chaise or buggy.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

SE in slang uses

In phrases

scull around (v.)

to wander aimlessly.

1937–84

Partridge DSUE (1984) 1029/1: C.20.