gassed, adj.³ — Green’s Dictionary of Slang

gassed adj.³

1. (US) delighted.

1954		‘Bop Dict.’ in Mad mag. Mar. 20: Cool – real nice! ... much like gone, gassed and groovy.
1963		J. Blake letter 21 Jan. in Joint (1972) 197: The girls were duly gassed.
1972		E. Grogan Ringolevio 95: He relaxed and he felt great [...] He was gassed.
2005		B. Coleman Rakim Told Me 223: ‘And I was gassed, because I was studying philosophy in the public library, so I was like: “Wow, the library ain’t got the Bhagavad-gita, so let me get that”’.
2012		L. Jose ‘Underhooks’ in Crime Factory: Hard Labour [ebook] Gassed, Manav sat.
2014		Stormzy ‘Shut Up’ 🎵 Yeah, I was gassed at the MOBO Awards / Why? Cause I ain't won a MOBO before.
2015		Guardian G2 3 July 5/1: He’d get too hype, too happy, too gassed.

2. (UK black) fast, speedy.

2017

theculturetrip.com ‘Guide to London Slang 10 Jan. 🌐 Gas/Gassed – extremely fast e.g ‘Dan’s a gas man.

gassed up (adj.)

(UK black) motivated, enthused.

2018-20

T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Gassed up - motivated.