Green’s Dictionary of Slang

1. (N.Z. Und.) Mt Eden Prison in Auckland (which is in fact sited in a valley behind the hill).

1953		I. Hamilton Till Human Voices Wake Us 143: If jail contained a creative side, it would be different. The Hill is a house of negativity.
1972		J. O’Grady It’s Your Shout, Mate! 31: He’d been to the Hill before. I hadn’t.
2003		McGill Reed Dict. of N.Z. Sl.

2. see Sugar Hill n. (1)