Green’s Dictionary of Slang

squinting eyes; a person with squinting eyes, also as term of address (see cite 1839) ; occas. in sing.; thus squinny/squinny-eyed/squiney-eyed adj., squinting.

[c.1621		Beaumont & Fletcher Wild-Goose-Chase I i: My thing is Marriage: And at his return I hope to put their squint-eyes right again].
1833		‘’ in Rake’s Budget in Spedding & Watt (eds) Bawdy Songbooks (2011) III 76: There’s peg, the squinny barmaid too, she looks four ways at I.
1837		R. Nicholson Cockney Adventures 4 Nov. 6: ‘What do you want, squinny eye?’ said the impudent man of the stable.
1838		Crim.-Con. Gaz. 1 Dec. 119/2: We recognised squinny eyed Jones who plays as if intoxicated.
1839		W. Holloway Dict. Provincialisms 162: Squinny-Eyes are squinting eyes.
1839		Crim.-Con. Gaz. 17 Aug. 267/1: [B]e careful what you are at ‘Squinnie-eye,’ or you probably get a lodging in the station-house.
1859		Hotten Dict. of Modern Sl. etc. 100: SQUINEY-EYED, squinting.
1860		Hotten Dict. of Modern Sl. etc. (2nd edn) 225: SQUINNY-EYED, squinting.
1873		Sl. Dict.
1885		Bulletin (Sydney) 24 Jan. 5/1: You say, in one of these contributions, ‘Squinny-eyed Liz is nuts on the Rorty Snob from Miller’s flat.’.
1888–94		‘Walter’ My Secret Life (1966) VII 1398: ‘You’re in a hurry,’ said she — light haired, squinny face.
1895		Crowe Aus. Sl. Dict. 80: Squinny-eyed, squinting, said of one looking any way but the right way.
1907		Jacobs & Batten Eng. Fairy Tales 176: Dame Goody saw that it had squinny eyes just like its father.
2003		Barret & Sommerstein (trans.) Aristophanes Assemblywomen 230: And supposing old Squinny-eyes attacks you?