Green’s Dictionary of Slang

1. veal [the two meats are supposedly not dissimilar when cooked].

1858

A. Mayhew Paved with Gold 105: On such occasions, bits of jelly were termed ‘size,’ and ‘fricandeau de veau’ was familiarly spoken of as ‘hedgehog’.

2. an unattractive woman.

1971		Current Sl. VI.
1975		G. Underwood ‘Razorback Sl.’ in AS L 1/2 61: hedgehog n Overweight, unattractive female.
2003		McGill Reed Dict. of N.Z. Sl. 100: hedgehog [...] 2. Radical feminist. Late C20.

3. (N.Z. prison) a member of the Devil’s Henchmen biker gang.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 86/1: hedgehog n. a Devil’s Henchmen gang­ member.