fly-by-night
noun
1 fly-by-night
A debtor who flees to avoid paying.
adjective
1 fly-by-night
of businesses and businessmen Untrustworthy or undependable.
2 fly-by-night
Ephemeral.
Moby thesaurus: brittle, capricious, changeable, corruptible, deciduous, dying, ephemeral, evanescent, fading, fickle, fleeting, flitting, flying, fragile, frail, fugacious, fugitive, impermanent, impetuous, impulsive ... show more.
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