Green’s Dictionary of Slang

candy adj.1

[ety. unknown; ? link to SE can, a container for liquids]

(mainly Anglo-Irish) drunk.

[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[Ire]Share Slanguage.