go off the deep end

Slang Dictionary

deep definition


  1. mod.
    intense; profound. : She gave this really deep speech to us about how we should stay off drugs.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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Slang Dictionary

go off the deep end definition


  1. in.
    to do or experience something in the extreme: to fall madly in love, to go crazy, to commit suicide, to fly into a rage, etc. : I saw what he had done, and I just went off the deep end. I was in a blind rage and didn't know what I was doing.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
Cite This Source
American Heritage
Idioms & Phrases

go off the deep end

  1. Become unduly excited, overwrought, or angry. For example, When he heard about John's smashing into his car, he went off the deep end. [c. 1920] Also see in deep, def. 2.

  2. Be irrationally carried away, act irresponsibly or heedlessly. For example, Just because you like her looks doesn't mean you should go off the deep end and propose. [c. 1920] In both of these colloquial usages deep end alludes to the deep end of a swimming pool.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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