bonkers

adjective
bon·​kers | \ ˈbäŋ-kərz How to pronounce bonkers (audio) , ˈbȯŋ-\

Definition of bonkers

informal
: crazy, mad: such as
a : very fond, enthusiastic, or excited She's bonkers for/about opera. He's bonkers for/about her. The fans went bonkers when their team won.
b : very angry, annoyed, or bothered Faced with the choice of being driven bonkers by their colicky newborn or inviting an outsider into their lives, Phil and Julie sanely decide to find a nanny.Booklist And the internet went completely and utterly bonkers about it, with critics climbing over one another to criticize Cyrus …— Tom Hawking
c sometimes offensive : having or showing severe mental illness Meanwhile, the greedy trustees of her fortune are trying to confuse her enough to have her declared bonkers so they can make their jobs permanent.— Ray Olson

Keep scrolling for more

Synonyms & Antonyms for bonkers

Synonyms

balmy, barmy [chiefly British], bats, batty, bedlam, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, insane, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge), moonstruck, non compos mentis, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish]

Antonyms

balanced, compos mentis, sane, sound, uncrazy

Visit the Thesaurus for More 

Examples of bonkers in a Sentence

You have to be bonkers to gamble that much. I was driven bonkers by the noise.

Recent Examples on the Web

Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018 Graffiti historian Roger Gastman—who helped orchestrate MOCA’s record-setting Art in the Streets show in 2011—takes over a 40,000-square-foot warehouse on the edge of Chinatown for a totally bonkers street art experience. Marielle Wakim, Los Angeles Magazine, "The 8 Best Things Going On In L.A. This Weekend," 21 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bonkers.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of bonkers

1945, in the meaning defined above

History and Etymology for bonkers

perhaps from bonk + -ers (as in crackers)

Keep scrolling for more

Learn More about bonkers

Dictionary Entries near bonkers

Bonjean curves

bonjour

bonk

bonkers

bon mot

Bonn

Bonnard

Statistics for bonkers

Last Updated

23 Apr 2019

Look-up Popularity

Time Traveler for bonkers

The first known use of bonkers was in 1945

See more words from the same year

More from Merriam-Webster on bonkers

Thesaurus: All synonyms and antonyms for bonkers

Comments on bonkers

What made you want to look up bonkers? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

incapable of being surmounted or overcome

Get Word of the Day daily email!

Test Your Vocabulary

Finance Words Quiz

  • a-piggy-bank
  • The etymology of mortgage is related most closely to which two words?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!