Green’s Dictionary of Slang

gargled adj.

[gargle v.]

drunk; thus sob-gargled, maudlin drunk.

[Ire]B. Behan After the Wake (1981) 49: We were in a singing house on the Northside and got very sob-gargled between drinking whiskey and thinking of the operation.
[Ire](con. 1920s) L. Redmond Emerald Square 47: Her oul’ fella came in shortly afterwards. Half gargled.
[Ire]P. Howard The Joy (2015) [ebook] I knew he was gargled. He couldn’t walk straight.