Green’s Dictionary of Slang

doss (out) v.

[SE dash]

(black) to leave, to run off.

[UK]C. Newland Scholar 61: Dere was about nine, ten brers wiv boras an’ sticks an’ I dunno what else man, so we jus’ dossed out. [Ibid.] 292: When he dosses, we’ll follow ’im.