Green’s Dictionary of Slang

tippling adj.

drunk.

1898		Barrier Miner (Broken Hill, NSW) 9 Nov. 3/3: A Tippling Horse [...] the horse was not only dead drunk but displayed all the stymptoms of an inveterate addiction to spirituous liquors.
1931		A. Hardin ‘Volstead English’ in AS VII:2 88: Terms referring to the state of intoxication: [...] Adjectives, etc: Tippling.