Green’s Dictionary of Slang

blow! excl.2

[blow v.1 (4d)]

go away! get moving!

[US]Maines & Grant Wise-crack Dict. 6/1: Blow! – The skin game man’s signal to his confederates to lose at the game.
[US](con. 1920s) J.T. Farrell Young Manhood in Studs Lonigan (1936) 164: ‘Hey, punk, blow!’ Studs commanded.
[US]H. McCoy Kiss Tomorrow Goodbye in Four Novels (1983) 265: You like your job? You wanna keep it? Then blow.
[WI]R. Mais Brother Man (1966) 154: You wanna do me a favour? Blow.
[US]A. Zugsmith Beat Generation 26: ‘Blow, will you?’ he told Jester.
[Aus]‘Nino Culotta’ Cop This Lot 108: Blow, mate [...] We don’t want ’em.
[UK]A. Baron Lowlife (2001) 183: O.K. Blow.
[US]A. Baraka Tales (1969) 14: Aww, man, blow, will you?
J. Hibberd Who? (1973) 145: Clear out. Piss off. Blow through.
[US]S. King Christine 148: Take your bad jokes and get lost, kid. Blow.