Green’s Dictionary of Slang

1. an eye; often in pl.

1847		Bell’s Life in Sydney 10 Apr. 2/4: The Port Phillip pet napped it smartly on the already fast-closing weeper.
1889		Nat. Police Gaz. (NY) 16 Nov. 3/2: [S]he always had her peeper — what a sport would call her ‘weeper’ — pointed straight at what would keep ’er fixed for game.
1938		J. Mercer ‘Jeepers Creepers’ 🎵 Jeepers Creepers, where’d you get those peepers? / O, those weepers / How they hypnotize.

2. (Aus.) in a butcher’s shop, an especially attractive cut of meat.

1914

Laverton Mercury (WA) 31 Oct. 3/7: Those prime joints which are placed out of reach of the customers are termed ‘weepers,’ on account of a well-known Smithfield salesman when addressing the crowd, tearfully slapping such joints with his knife and saying: ‘Look; gaze on that and weep’ .