Green’s Dictionary of Slang

1. (drugs) LSD.

1977		L. Young et al. Recreational Drugs.
1993		G. Pelecanos Nick’s Trip 22: Billy and I ate two more tabs of haze and drove to a Piggly Wiggly.
2001		ONDCP Street Terms 11: Haze — LSD.

2. (drugs) a kind of marijuana.

1999		Observer 15 Aug. 15: Santa Cruz, California, is [...] where ‘skunk’ and ‘haze’ were first bred.
2004		Observer Mag. 13 June 51: Haze. Pure Sativa.
2017		hubpages.com ‘Roadman Slang 4 Jun. 🌐 Loud/Haze - indica/sativa.