RhymeZone: jackleg definitions

Definitions of jackleg:

adjective: (US) Amateur, untrained; incompetent.
adjective: (US) Dishonest, unscrupulous.
adjective: (US) Ineptly built or operated; makeshift.
noun: A type of drill operated by means of compressed air.
noun: (US) An amateur; an untrained or incompetent person.
noun: (US) A shyster or con artist; a gambler who cheats; a generally dishonest or reprehensible person.

(Definitions from Wiktionary)