Idiom of the day :- Fly-by-night

Usage, examples and definition of the Idiom :-

Fly-by-night businesses, people or organizations have no established reputations in a community. They begin business only to make a quick profit, often by dishonest means. Having made their money, they often disappear without a trace. ‘The fly-by-night agency that sold me my air ticket promised me a first-class seat to Athens.’