Green’s Dictionary of Slang

1. (N.Z.) a sausage [abbr.].

1911		Gem 2 Dec. 5: ‘Sausages, deah boy!’ ‘Sosses!’ replied Digby. [Ibid.] 6: Have another soss, Gussy?
1916		G. Jennings Poached Eggs and Pearls (1917) 14: What do you bet? Poached eggs on toast or soss and mash!
1959		I. & P. Opie Lore and Lang. of Schoolchildren (1977) 183: Sausages are [...] ‘’ossies’.
1983		Beano 24 Sept. 2: Sossies, icecream [...] ’nanas, crisps.
2003		McGill Reed Dict. of N.Z. Sl. 178: sausie/soss/sossie A sausage, or a penis.
2016		Guardian CiF 14 Dec. 🌐 Bearing in mind how dogs love a sosso, and the concept of pollies bringing in votes by demonstrating their technique in demolishing snags.

2. (N.Z.) the penis.

2003

see sense 1.