yoxter, n. — Green’s Dictionary of Slang

yoxter n.

[ety. unknown; ? link to Scot./dial. yox, to vomit, to cough up, i.e. the convict has ‘come up again’]

a convict who has returned from transportation before the full expiry of their sentence.

1864, 1867, 1870		Hotten Sl. Dict.
1869		Australasian (Melbourne) 17 July 8/5: [A] convict who breaks his ban and escapes is called a yoxter.
1890–1904		Farmer & Henley Sl. and Its Analogues.