jackleg

Jackleg

Adjective 

[jak-leg] 

1. unskilled or untrained for one’s work; amateur:
    a jackleg electrician. 

2. unscrupulous or without the accepted standards of one’s profession:
    a jackleg lawyer. 

3. makeshift; temporary. 

Noun 

4. an unskilled or unscrupulous itinerant worker or practitioner. 

Origin:
1840–50, Americanism; perhaps jack1+ (black)leg

“Out there in the sunshine the jackleg looked the part, so I wondered how we come to be faked by him.“
-Herbert Quick, Yellowstone Nights