OED usages: "a1890 in Barrère & Leland Dict. Slang (1890) II. 295/1 He rolls home rather squiffed, just as the day is dawning. 1926 S. HOWARD Lucky Sam McCarver I. 36, I think I did meet you once before, though I was a bit squiffed at the time. 1961 see CHUMBLE v.. 1977 B. GARFIELD Recoil ii. 28 I'm already a little squiffed. Ought to go on the wagon."