Green’s Dictionary of Slang

winder n.1

[wind n.2 (1)]

1. a sentence of transportation for life.

[UK]Lex. Balatronicum n.p.: WINDER. Transportation for life. The blowen has napped a winder for a lift; the wench is transported for life for stealing in a shop.
[US] ‘Hundred Stretches Hence’ in Matsell Vocabulum 124: Some rubbed to whit had napped a winder, / And some were scragged and took a blinder.
[Aus]Crowe Aus. Sl. Dict. 96: Winder, a life sentence.

2. (Aus.) a life sentence.

[Aus]Argus (Melbourne) 20 Sept. 6/4: Imprisonment for a long period is a jade, and for life a winder.