Green’s Dictionary of Slang

duplicitous, untrustworthy, swindling.

1839		T. Hood ‘A Flying Visit’ Works (1862) IV 302: Some guess’d it high Dutch, / Others thought it had much / In sound of the true Hoky-poky-ish touch.
1851		Melville Moby Dick (1907) 432: Such a funny, sporty, gamy, jesty, joky, hoky-poky lad, is the Ocean, oh!
1932		‘Ex-Légionnaire 1384 Hell Hounds of France 174: ‘Now, listen, you bull-nosed Jerries, no hokey-pokey business. D’ja get me?’ .