go crazy

idiomatic phrase

1
: to become mentally unsound
I must be going crazy. I can't find my car keys anywhere.
not used technically
2
: to act in a way that is out of control : to act wildly
We were just talking when he suddenly went crazy and started screaming.
The crowd went crazy when the team won the championship.

Examples of go crazy in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Okay, at that point, the Heimlich maneuver went crazy, like blew out, God knows how many thousands of lives have been saved. Wesley Stenzel, Entertainment Weekly, 28 Jan. 2026 Sky hit a basement dropkick as the crowd went crazy for the wildly popular star. Blake Oestriecher, Forbes.com, 25 Jan. 2026 Wow, this pill grab bag goes crazy. Emma Specter, Vogue, 23 Jan. 2026 Your whole team goes crazy when that happens. Parker Gabriel, Denver Post, 18 Jan. 2026 See All Example Sentences for go crazy

Word History

First Known Use

1743, in the meaning defined at sense 2

Time Traveler
The first known use of go crazy was in 1743

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Cite this Entry

“Go crazy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/go%20crazy. Accessed 31 Jan. 2026.

Last Updated: - Updated example sentences
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