Green’s Dictionary of Slang

1. (US) uncompromising, absolute.

1899–1900		C.L. Cullen Tales of the Ex-Tanks 96: I had a straight-out talk with him then, and told him the whole game.
1953		T.A.G. Hungerford Riverslake 3: Urgers, touts, bludgers, bash-artists and straight-out crooks.
1956		T. Ronan Moleskin Midas 17: The second restrained him from becoming cook, hut-keeper, shepherd, or straight-out ‘Murrumbidgee whaler’.
1974		D. Ireland Burn 59: The idiot wanted frills, not a straight-out bang; then he didn’t come across.
1997		J. Birmingham Tasmanian Babes Fiasco (1998) 155: They were just straight-out yobbos.
2003		A.N. LeBlanc Random Family 60: Lourdes had proven herself to be a straight-out fiend.

2. (Aus.) honest, undisguised.

1906

Sun. Times (Perth) 29 Apr. 4/7: The makers of straight-out betting books in this country work under luckier conditions.