Learn English idioms with meanings and examples

🌎Region: International 📊Difficulty Level:intermediate

fool's gold

Something that looks valuable or promising but is actually worthless, misleading, or a poor substitute for the real thing.

Originally refers to iron pyrite, a mineral that resembles real gold and often fooled inexperienced prospectors; it became a metaphor for deceptive value or false promise.

Often mildly critical: implies something is deceptive, overhyped, or a false promise. Used in everyday and business contexts; suggests someone may be misled by appearances.

  • That investment looked exciting, but it turned out to be fool's gold.
  • His compliment was fool's gold—nice words hiding a selfish motive.
  • The early sales spike was fool's gold; demand collapsed the next month.
  • Social media fame can be fool's gold if it doesn't lead to real opportunities.
  • They chased fool's gold instead of focusing on steady, long-term growth.

A fixed noun phrase with possessive: “fool's gold” (not *fools gold* in standard form). Often used as a mass noun: “is fool's gold,” “turned out to be fool's gold.”

  • false promise
  • sham
  • counterfeit
  • illusion
  • mirage
  • the real deal
  • the genuine article
  • true gold
  • something of real value