furze-bush, n. — Green’s Dictionary of Slang

furze-bush n.

[SE furze, a spiny evergreen shrub with yellow flowers + bush n.¹ (2a)/SE bush]

the female, occas. male, pubic hair.

[1597–8		Jonson Case Is Altered IV iv: This bear’s skin, this heath, this furze-bush].
1835		‘William’s Dew-Drop’ in Knowing Chaunter 47: On what a fine thick stem it blows, / And oh, what furze around it grows.
1980		Maledicta IV:2 (Winter) 187: To [...] return to the quim whiskers, common terms include [...] the botanical (Furzebush, forest, bush and parsley).