fly by night
[adjective]
Synonyms: unreliable, dubious, questionable, trustless, undependable, unsure, untrustworthy, untrusty

[TahlilGaran] English Synonym Dictionary ▲

ˈfly-by-ˌnight 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

[TahlilGaran] Dictionary of Contemporary English ▲

fly-by-night
a fly-by-night person or organization cannot be trusted because they have not been established long, and could leave or close at any time.
They've opened one of those cheap and nasty fly-by-night stores on the High Street.
(always before noun)
I'm serious about representing my constituents. I'm not a fly-by-night politician.

[TahlilGaran] English Idioms Dictionary ▲

fly-by-night
an unreliable business or person
The new company is a fly-by-night operation.

[TahlilGaran] English Idioms Dictionary ▲

fly by night
fly-by-night¹ adj. Set up to make a lot of money in a hurry, then disappear so people can't find you to complain about poor work, etc.; not trustworthy; not reliable.
Mrs. Blank bought her vacuum cleaner from a new company; when she tried to have it fixed, she found it was a fly-by-night business.
fly-by-night² n., informal
1. A company that sells many cheap things for a big profit and then disappears.
A dependable company honors its guarantees, but a fly-by-night only wants your money.
2. A person who does not pay his bills, but sneaks away (as at night.)
Hotels are bothered by fly-by-nights.

[TahlilGaran] English Idioms Dictionary ▲