Green’s Dictionary of Slang

tross n.

a sort.

1877		J. Diprose London Life 43: I’ve had a regular ‘tros-dab’ (bad sort) to day.
1882		Sydney Sl. Dict. (2 edn) 11: Dab tros - Bad sort.
1890–1904		Farmer & Henley Sl. and Its Analogues.

In exclamations

sling your tross!

go away! be off!

1898

E. Pugh ‘The Inevitable Thing’ in Keating Working Class Stories of the 1890s (1971) 113: Well I do. So you can sling yer tross.