Green’s Dictionary of Slang

1. (orig. US, also whacked) murdered.

1967		L. Bruce Essential Lenny Bruce 41: As soon as he comes back, whacked out again.
1980		(con. 1974) W. Sherman Times Square 260: Ohlstein’s ready to put a hit out on him. Not that I would mind if he got whacked.
1989		Pileggi & Scorsese Goodfellas [film script] 53: You got out of line, you got whacked.
2006		D. Winslow Winter of Frankie Machine (2007) 89: The guy finally makes it to the ruling council [...] and then gets himself whacked out just a few weeks later.
2010		J. Ellroy Hilliker Curse 25: Jack kennedy got elected, got laid, got whacked.

2. exhausted.

1961		H. Ellison Rockabilly (1963) 67: I’m beat bushed whacked-out finished.
1961		T. Taylor Baron’s Court All Change (2011) 142: When I did arrive, I was whacked out.
1970		A. Sillitoe Start in Life (1979) 249: We crept down to the dining-room for re-fuelling, both of us bruised and wacked-out.
1986		J. Ellroy Silent Terror 198: Night four—dingy, zorched, whacked-out and fried from 108 hours of continuous consciousness.
1990		in D. Campbell That Was Business, This Is Personal 35: It was a treat to go to the Isle of Wight and come back not feeling absolutely whacked out.
1999		K. Sampson Powder 440: James beamed at Wheezer, whacked out of his mind, proud as punch.

3. under the influence of a drug or of alcohol, intoxicated or even unconscious.

1968		T. Wolfe Electric Kool-Aid Acid Test (1969) 285: This new San Francisco-L.A. LSD thing, with wacked-out kids and delirious rock ’n’ roll.
1970		T. Southern Blue Movie (1974) 29: Matinee idol Rex McGuire, whacked out of his skull.
1989		C. Hiaasen Skin Tight 246: Heather had lain unconscious for seven hours, whacked out on world-class pharmaceutical narcotics.
1993		M.B. ‘Chopper’ Read How to Shoot Friends 40: If you so much as farted out of place, you would be whacked out with medication.
1998		Source Oct. 178: The third boy’s still whacked out on glue.
c.2003		D. Vrij ‘Tying Off’ on Inter-zone.org 🌐 [He] remembered that the very whacked out Deanna had also given him the number for Carlos’s brother.
2007		R. Milward Apples (2023) 12: Jenni had poppers in her bag and they were all getting whacked-out.
2017		D. Winslow The Force [ebook] When he wasn’t whacked out, the snitch worked the streets like he was cop.
2020		C. Hiaasen Squeeze Me 305: [of a snake] ‘That big fucker is seriously whacked’.

4. (also whack-out) unstable, eccentric.

1966		Baltimore Sun (MD) Sun. Mag. 10 July 4/1: All-the-way Beatle haircuts are now ‘wacked-out,’ which means inane.
1973		L. Shecter On the Pad 135: I might have stayed with that broad, a whack-out, crazy, sex maniac broad, but a knockout-looking head.
1977		J. Olsen Secret of Fire Five 29: That new chief, he’s whacked out, he’s psycho.
1983		R. Price Breaks 21: Pictures [...] my whacked-out stepgrandmother had made from various types of uncooked macaronis and others pastas in her recreational therapy sessions.
1993		T. Jones Pugilist at Rest 68: He would get right in and mix with really dangerous, really spooky whacked-out freaks.
2000		J.J. Connolly Layer Cake 157: The guy’s whacked out, frazzled, glaring eyes.
2005		M.B. ‘Chopper’ Read Chopper 4 23: Dope-smoking, whacked out greenies.
2010		C. Hiaasen Star Island (2011) 88: I’m tired of playing your whacked-out daughter. I want my own vida loca.
2020		(con. 1991-94) W. Boyle City of Margins 107: ‘He’s whacked out completely [...] thinks he’s in a western’.

5. emotionally drained.

1993

A. Rodriguez Spidertown (1994) 82: I don’t think he meant to freak you with that newspaper thing. He just got whacked out, desperate.