bonkers

American  

[bong-kerz] / ˈbɒŋ kərz /

adjective

Slang.

1. mentally unbalanced; mad; crazy.

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bonkers British  

/ ˈbɒŋkəz /

adjective

1. slang mad; crazy

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Usage

Where does the word bonkers come from? Bonkers is a funny-sounding word. It's a goofy, lighter, informal way to say "crazy" or "nuts”—but keep in mind that’s it not so fun to make fun of people’s mental health.Its origins are unclear, but bonkers is first recorded as British naval slang for "a bit drunk" in the 1940s—perhaps acting like someone has bonked, or hit, them on the head.The roots of these other words may get a rise—of laughter or surprise—out of you. Run on over to our roundup of them at "Weird Word Origins That Will Make Your Family Laugh."

Etymology

Origin of bonkers

1945–50; of uncertain origin; for final element, -ers

Example Sentences

In one marquee game that didn’t have a bonkers finish, the Jacksonville Jaguars dealt the Denver Broncos their first loss since September.

From The Wall Street Journal

Despite his size, he dunks so rarely that when he actually does manage to squeak the ball over the rim, the Denver bench goes absolutely bonkers.

From The Wall Street Journal

Flocks of fans aren't rushing to travel agents in the same way they did two years ago, because that would just be bonkers.

From BBC

"The charges against them are completely bonkers," he added.

From BBC

If he sees rust now, he will “go bonkers,” he says.

From The Wall Street Journal