fly-by-nights

Shady overnight vanishers

Fly-by-nights are people or businesses considered untrustworthy or unlikely to meet their obligations, especially ones that appear suddenly and vanish just as quickly—often after taking your money.

The term suggests operating under cover of darkness to avoid accountability.

The contractor turned out to be one of those fly-by-nights who disappeared after the deposit cleared.

As an adjective, fly-by-night describes such unreliable enterprises: a fly-by-night operation.

opportunistic

speculators

Those betting on markets

fortune-hunters · gold-diggers · opportunists · chancers · wheeler-dealers · boom-and-bust · vultures · predators · mercenaries · adventurers

untrustworthy

unreliable

Not consistently performing

questionable · disreputable · sketchy · iffy · flaky · slippery · shifty · dodgy · unscrupulous · unprincipled

shady

swindlers

Deceivers who steal through trickery

hustlers · charlatans · grifters · flimflammers · crooks · cheats · sharks · sharpers · tricksters · mountebanks

transient

drifters

Aimless travelers, homeless rovers

wanderers · floaters · migrants · rovers · gypsies · transients · rootless · footloose · unsettled · peripatetic

Opposites
business legitimacy and permanence

fly-by-nightsinstitutions

Established organizations or practices

pillars of the community · stalwarts · mainstays · fixtures · household names

reputation and trustworthiness

fly-by-nightshonest brokers

Impartial third-party facilitators

straight shooters

Family

night, flies, flying, flights, flight, nights, nightly, nighttime, overnight

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Negative · Everyday, not technical · Rated G