Green’s Dictionary of Slang

1. an overdose.

1959		L. Lipton Holy Barbarians 186: It was an OD [...] of horse that led him back to marijuana.
1965		C. Brown Manchild in the Promised Land (1969) 196: ‘Well, he died. The cat took an O.D.,’ an overdose of heroin.
1975		E. Torres Carlito’s Way 9: The dope fiends had the sores, the scabs, the O.D.’s.
1981		H. Gould Fort Apache, The Bronx 317: ‘OD, OD,’ Isabella moaned. She tore the needle out of her arm.
1990		(con. 1930s–60s) H. Huncke Guilty of Everything (1998) 234: I want to tell you about my first OD.
2000		Guardian Guide 5–11 Feb. 13: Every single person in the series is able to blame themselves for the OD because they’ve all been horrible to Kelly.
2000		P. Temple Dead Point (2008) [ebook] They’re sayin it’s an ordinary OD.
2010		K. Richards Life 405: There’s junkies that keep upping their dosage, and that’s why you get ODs.
2023		(con. 1962) J. Ellroy Enchanters 14: Marilyn Monroe’s dead. It looks like a pill OD.

2. one who has taken an overdose.

1972		E. Grogan Ringolevio 55: Everyone thinks that you’re just another straight OD.
2000		P. Temple Dead Point (2008) [ebook] Are you still saying they actually believe this bloke’s an OD.
2012		C. Stella Rough Riders 54: Now he was viewing the OD [...] A once attractive, nineteen-year-old, white male had died from an overdose of heroin.
2013		D. Whish-Wilson Zero at the Bone [ebook] The two ODs, if Marrone got wind of them, would be enough to arouse his suspicions.