conk out

conk out idiom
  1. Stop functioning, fail, as in The engine finally conked out. [Colloquial; early 1900s]
  2. Fall asleep, as in Every evening he conked out in front of the television set. [1940s]
  3. Faint or collapse, as in I don't know if it was the heat, but she suddenly conked out. [1920s]
  4. Die, as in He's paranoid about conking out and he's only twenty! [Late 1920s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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