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Reference : Slang : F : flake

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flake American English

Meaning: an unreliable person who says they'll do something, but then doesn't do it

For example:

  • Lenny's such a flake! This is the third time he hasn't come after we'd planned to meet.

  • John called in sick again today. He's such a flake.

Variety: This slang is typically used in American English but may be used in other varieties of English too.

Quick Quiz:

Lizzie said Chrissie was a flake because she
  1. didn't turn up at the party
  2. didn't pay her share of the bill
  3. didn't want to join in the fun