Green’s Dictionary of Slang

jamoke n.2

also jamocha, jamouche
[a WWI soldier’s nickname; on the basis of the first citation (it is spelled jamocha) there is an apparent link to jamoke n.1 but no obvious reason]

(US) a stupid or objectionable fellow.

[[US]D. Hammett ‘The Golden Horseshoe’ in Continental Op (1975) 49: He turned out to be one Fred Rooney, alias ‘Jamocha’].
[US]J. Evans Halo in Blood (1988) 42: If I was going to find out what kind of a jamoke Marlin was, I had to start by finding him.
[US]G.V. Higgins Digger’s Game (1981) 32: I don’t think bringing in them jamokes was such a hot idea.
[US]G.V. Higgins Rat on Fire (1982) 14: I don’t rate your chances none too good if that jamoke’s going to defend you.
[US]Eble Campus Sl. Mar. 4: jamouche – socially inept person.
[US]R. Price Clockers 97: Mazilli nodded in the direction that Touhey had gone. ‘Fuckin’ jamoke,’ he said.
[US]N. Green Shooting Dr. Jack (2002) 139: Now we got those two jamokes with guns standing around.
[US]J. Ellroy Widespread Panic 156: ‘You’re just some jamoke that’s outlived his usefulness’.