Green’s Dictionary of Slang

(US black) intoxicated on drink or drugs.

1999		YoungBloodZ ‘U-Way’ 🎵 Off in the club gettin’ slizzard, shawty, is what we do.
2005		Boyz N Da Hood ‘Still Slizzard’ 🎵 Still slizzard from the night before.
2011		buzzfeed.com 16 Feb. 🌐 This is great: Someone at the Red Cross accidentally tweeted about ‘getting slizzard’.