How to Use fly-by-night in a Sentence

fly-by-night

noun

• Rookies or cost-cutting, fly-by-night operators can’t do this.
  — Craig Hooper, Forbes.com, 20 July 2026
• Plus, the human longevity field is notorious for cranks, unproven supplements and fly-by-night clinics.
  — Amy Feldman, Forbes.com, 12 Aug. 2025
• At the same time, small fly-by-night schools have been opened by profiteers and people with problematic pasts or no educational experience.
  — Jennifer Smith Richards, ProPublica, 16 July 2026
• With an anode, cathode, separator, electrolyte, and other electrical elements, even fly-by-night battery makers can get the cells to work.
  — Andrew Moseman, IEEE Spectrum, 22 Nov. 2025
• Lots of fly-by-night import shops sprang up, happy to rubber-stamp any Mercedes with a catalytic converter haphazardly welded under the floorboards.
  — Raphael Orlove, Robb Report, 23 Sep. 2025
• Getty Images If the Chicago Cubs were a tradable security on the NASDAQ, the team’s stock would be more volatile than that of your typical gold/silver ETF or a fly-by-night tech startup.
  — Andy Frye, Forbes.com, 28 Aug. 2025