Green’s Dictionary of Slang

a hospital; also attrib.

1998		K. Sampson Awaydays 106: Someone’s got to get John to hozzy.
2003		N. Griffiths Stump 28: — Yew’ve got-a go up yer, av yew? [...] — Not thee ozzy, no.
2012		(con. 1980s) I. Welsh Skagboys 32: Couldn’t go to the hozzie, they was just lifting every fucker.
2012		(con. 1980s) I. Welsh Skagboys 193: Two dodgy bamsticks oot ay circulation through the jail and hozzy gigs.
2015		I. Welsh Decent Ride 213: Hud a pretty bad night eftir ah got back fae the hozzy.