hold onto your hat

English

Pronunciation
  • Audio (AU)(file)

Phrase

hold onto your hat

  1. (idiomatic) Prepare for a shock!
    • 2011, Mark Ryan, Geometry Essentials For Dummies, John Wiley & Sons, →ISBN, page 14:
      Hold onto your hat—intersecting planes are planes that cross, or intersect.

Usage notes

This is often said sarcastically, preceding an obvious statement.

Alternative forms
  • hang onto your hat
  • hang on to your hat
  • hold on to your hat
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