Definitions of fly-by-night
  1. adjective
    (of businesses and businessmen) unscrupulous
    synonyms: shady
    untrustworthy, untrusty
    not worthy of trust or belief
  2. adjective
    “the symphony is no fly-by-night venture”
    impermanent, temporary
    not permanent; not lasting
  3. noun
    a debtor who flees to avoid paying
    see moresee less
    type of:
    debitor, debtor
    a person who owes a creditor; someone who has the obligation of paying a debt
Word Family