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English definition of “fly-by-night”

fly-by-night

adjective [before noun]     /ˈflaɪ.baɪ.naɪt/ informal disapproving
Fly-by-night companies or business people cannot be trusted because they are likely to get into debt and close down the business to avoid paying the debts or satisfying agreements : a fly-by-night operator / organization DishonestStarting, succeeding and failing in business
(Definition of fly-by-night adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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