Green’s Dictionary of Slang

(US) ignorant, second-rate.

1911		J. Lomax Cowboy Songs 156: He thumped him in the shoulders and spurred him when he whirled, / To show them flunky punchers that he was the wolf of the world.
1973		P. Maas Serpico 207: ‘What about the bosses? You going after them,or just some flunky cops?’.