Green’s Dictionary of Slang

(US drugs) Oxycontin, a painkiller based on synthetic morphine.

2001		Indep. 9 Feb. 14: Most of those arrested were offering Oxy, as it is known, at between $25 and $50 a pill.
2008		D.R. Pollock ‘Blessed’ in Knockemstiff 174: Because the Oxy was time-released, I learned to lick the coating off the tabs and chop them into powder, then snort them for a quicker delivery.
2012		M. McBride Frank Sinatra in a Blender [ebook] When the Oxy hit, my right eye began to water.
2019		D. Winslow Border [ebook] The pills are everywhere — Oxy, Vicodin, Percocet.
2020		S.A. Crosby Blacktop Wasteland 74: ‘We all straight. Don’t get high. Don’t pop no Oxy. Don’t smoke a blunt’.