jackleg

adj.

1. Lacking skill or training; incompetent. Used especially of lawyers or preachers.
2. Unscrupulous or dishonest.
3. Makeshift; temporary.

n.

1. An unskilled or unscrupulous itinerant worker.
2. A strikebreaker.

[Perhaps JACK + (BLACK)LEG.]

an amateur; characterized by unscrupulousness, dishonesty or lack or standards; makeshift