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off the deep end

see go off the deep end.

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RELATED WORDS

foolhardy, ill-considered, thoughtless, irresponsible, careless, unwise, ill-advised, foolish, reckless, tricky, uncertain, unhealthy, unsound, treacherous, hazardous, unsafe, precarious, perilous, sensitive, delicate

Nearby words

  1. off stump,
  2. off the air,
  3. off the beam,
  4. off the beaten track,
  5. off the cuff,
  6. off the ground,
  7. off the handle,
  8. off the hook,
  9. off the mark,
  10. off the rack
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.