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an acid test

Meaning: An acid test is something that shows the true worth or value of something or someone.

For example:

  • Our new player has been doing well at training and in practice matches, but the acid test will come in her first real match.

  • The new political party is doing better and better in the polls, but the acid test will be the next election.

Origin: Possibly related to the fact that a test involving acid has been used for over a century to prove that a metal that looks like gold is, or is not, really gold.

Quick Quiz:

The real acid test for the new drug will come when it's
  1. tested in a computer simulation
  2. tested on mice with acid reflux
  3. tested on human beings

Discuss: an acid test

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