Green’s Dictionary of Slang

askew, out of true, crooked.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1834		‘Jack Downing’ Andrew Jackson 71: Comin up tu the gineral and givin him a skewvow look, axt him how he lik’d his supper.
1890–1904		Farmer & Henley Sl. and Its Analogues.