I. ˈflī-bī-ˌnīt noun
Date: 1822
1. : one that seeks to evade responsibilities and especially creditors by flight
2. : one without established reputation or standing ; especially : a shaky business enterprise
II. adjective
Date: 1914
1. : given to making a quick profit usually by shady or irresponsible acts
2. : transitory , passing
fly-by-night fashions