English version

fly-by-night in Business basics topic

From Longman Dictionary of Contemporary Englishfly-by-nightˈfly-by-ˌnight adjective [only before noun] informal  BBa 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
Examples from the Corpus
fly-by-nightNot the richest of pickings, usually left to the fly-by-night minicabs.He also insists that it won't be a fly-by-night operation, that his commitment to the community is lasting and genuine.This would solve the problem of fly-by-night organisers.