Green’s Dictionary of Slang

1. (US und.) one hundred, esp. a $100 bill (also a hundy-note).

1996		Dly Record (Morristown, NJ) 21 Feb. C2/6: ‘Jeez [...] when you spend a hundy for wine, the bad bottles are hard to live with’.
1996		J. Byrell Lairs, Urgers & Coat-Tuggers 304: ‘Would you please set me for a nice neat hundy-note, Frank?’.
2001		Detroit Free Press (MI) 28 June 2D/2: Brothers, can you spare a few hundies?
2012		Gazette (Cedar Rapids, IO) 17 Nov. P7/5: One of the few who plopped a hundy on Klein to win.
2013		T. Robinson Hard Bounce [ebook] ‘Was that a hundie you just gave that little prick?’.
2019		D. Winslow Border [ebook] Davido [...] slips him a hundy and a bag of weed.

2. (N.Z. prison) a $100 bag of strong marijuana.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 91/1: hundie n. a bag of skunk weedto the value of $100.