bananas

American

[buh-nan-uhz] / bəˈnæn əz /

adjective

Slang.

crazy; deranged.

All that chatter is driving me bananas.
wildly enthusiastic.

The crowd went bananas when the music began.

bananas British

/ bəˈnɑːnəz /

adjective

slang crazy (esp in the phrase go bananas )

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of bananas

1965–70, see banana, -s ³

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

What is driving me bananas these days are people who watch things on their phones without headphones.

From The Wall Street Journal • May 11, 2026

In my house, black beans are to brownies as bananas are to banana bread.

From Salon • May 5, 2026

I’ll have a green smoothie with kale, spinach, bananas and blueberries and some collagen powder.

From Los Angeles Times • May 1, 2026

But some entrepreneurs have also identified business opportunities, including food sellers who offer hungry drivers bread and bananas, or more elaborate meals of spicy biryani rice.

From Barron's • Apr. 21, 2026

"They've got bananas for horns," the critic said.

From "The Sun Also Rises" by Ernest Hemingway

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023