Definition of jack-legged in English:

jack-legged

Pronunciation /ˈdʒaklɛɡd/

adjective

dialect, informal US, Midlands English
  • 1Of a lawyer, preacher, or other professional: lacking skills or training, incompetent; unscrupulous, dishonest; (also of a preacher, chiefly in African-American usage) itinerant.

  • 2Made or done hastily, clumsily, or unskilfully; shoddy, botched; makeshift, thrown-together.

    Apparently rare before the late 20th century.

Origin

Mid 19th century; earliest use found in The Congressional Globe. Probably from Jack + legged, as an alteration of jackleg.