0 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
1 (esp. of a business) not able to be trusted, and likely to stop operating without any notice:
a fly-by-night operation
2 a fly-by-night business or worker does not offer good products or services and is likely to avoid paying debts or satisfying agreements by leaving the area:
fly-by-night companies/contractors/operators
Such areas become particularly vulnerable to the activities of fly-by-night operators.
The chairman talked about the corporation's programmes and the difficulties of fly-by-night customers.
He is not some fly-by-night mediator whom no one has ever heard of.
We know that it is no fly-by-night affair.
No one knew how many there were; some farriers were better than others, but there were perhaps too many "fly-by-night" ones.
