ˈfly-by-ˌnight BrE AmE adjective [only before noun] informal
a fly-by-night company or businessman is one that you cannot trust because they have only been in business for a short time and are only interested in making quick profits
ˈfly-by-ˌnight BrE AmE adjective [only before noun] informal
a fly-by-night company or businessman is one that you cannot trust because they have only been in business for a short time and are only interested in making quick profits
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012