don't I know it

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English

Etymology

A rhetorical question.

Interjection

don't I know it

  1. (informal) I know; I am very familiar with it (some stated fact).
    • 1927 April, Boys' Life, page 16:
      "Here's your shirt," said Slippery. "Make it snappy, we're late."
      "Don't I know it," replied the Owl, emerging from the closet with his dinner jacket and vest []

Further reading