bull-head, n.² — Green’s Dictionary of Slang

bull-head n.²

also bull’s head

[ext. bull n.¹ (2); the resemblance of the style to a bull’s matted ‘forelocks’]

a mass of curled or frizzled hair worn over the forehead by a woman.

1672		Marvell Rehearsal Transpos’d I 3: To trick up the good old Bishop in a yellow Coif and a Bulls-head, that he may appear in Fashion.
1688		(ref. to 1674) R. Holme Academy of Armoury II xvii 119: Some term this curled Forehead from the French word Taure, a Bull-head. This was the fashion of Women to wear Bull-heads, or Bull-like foreheads, anno 1674.