Green’s Dictionary of Slang

ace-deuce adv.

[SE AC/DC]

(US) at an angle; also adj.

I. Blassinghame Dakota Cowboys (1964) 130: set my hat at an ace-deuce angle.
[US]D. Goines Dopefiend (1991) 182: [He] set the hat ace-deuce across his head.
[US]O. Hawkins Ghetto Sketches 17: Sweet Peeter D. cocks his lid ace-deuce.
[US]E. Folb Runnin’ Down Some Lines 227: ace-deuce to the side 1. At an angle. 2. To the side.
[US]‘Dutch’ ? (Pronounced Que) [ebook] [...] putting a white fedora with a black band on his head and cocked it ace-deuce.