Green’s Dictionary of Slang

1. (US campus, also cashed in) physically, mentally or economically exhausted.

1907		C.E. Mulford Bar-20 iii: ‘They might git away on ’em,’ [i.e. horses] suggested the practical Johnny. ‘Can’t. They’s all cashed in.’.
1989		P. Munro Sl. U. 55: After studying for my midterm all night I’m cashed.
1997–2001		Online Sl. Dict. 🌐 cashed adj [...] 2. tired, exhausted. (‘Man, I’m completely cashed.’).

2. (US) dead.

1940

O. Strange Sudden Takes the Trail 70: I left with the posse an’ we all figured you was cashed.

3. (drugs) used of a marijuana bowl or pipe that contains nothing but ash.

1981		cited in Spears Sl. and Jargon of Drugs and Drink (1986).
1997–2001		Online Sl. Dict. 🌐 cashed adj 1. empty. Usually refers to a marijuana smoking device. (‘I think the bowl is cashed.’).
2015		P. Beatty Sellout (2016) 13: Some takes the pipe from my hand. ‘C’mon, man. That shit is cashed’.

4. intoxicated by a drug.

2001

Source Aug. 147: The blunt-cashed Snoop cracks open a bag of chips.

5. having had a sufficiency.

2004

Eble Campus Sl. Apr. 1: cashed – finished: I think I’m cashed for the night.