Wild-cat
Pronunciation : Wild"-cat`
Part of Speech : a.
Definition : 1. Unsound; worthless; irresponsible; unsafe; -- said to have been originally applied to the notes of an insolvent bank in Michigan upon which there was the figure of a panther.
2. (Railroad)
Defn: Running without control; running along the line without a train; as, a wild-cat locomotive.
Source : Webster's Unabridged Dictionary, 1913