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

The line in Swift's song and The Life of a Showgirl's cover art appears to be inspired by a Victorian-era painting that depicts the scene in Hamlet when Ophelia goes crazy and falls into a stream and drowns after learning Hamlet killed her father. —Olivia B. Waxman, Time, 3 Oct. 2025

After getting Trevor Story to fly out to Trent Grisham with the bases loaded, Cruz went crazy in celebration. —Ryan Morik, FOXNews.com, 2 Oct. 2025

That video went crazy, had a million views, people started tagging me. —Heran Mamo, Billboard, 23 Sep. 2025

Fans, many of whom were local, went crazy for the metalcore band, with dozens of people crowdsurfing throughout the set. —Kirby Adams, Louisville Courier Journal, 22 Sep. 2025

Word History

First Known Use

1743, in the meaning defined at sense 2

Rhymes for go crazy

• calabrese
• daisy
• hazy
• lazy