adjective Slang.

mentally unbalanced; mad; crazy.

Origin of bonkers

1945–50; of uncertain origin; for final element, cf. -ers Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for bonkers

gaga, bats

Examples from the Web for bonkers

Contemporary Examples of bonkers

Historical Examples of bonkers

  • It was driving him bonkers not to be able to ride any longer.


    Cory Doctorow

British Dictionary definitions for bonkers



slang, mainly British mad; crazy

Word Origin for bonkers

C20 (originally in the sense: slightly drunk, tipsy): of unknown origin
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

Word Origin and History for bonkers

"crazy," 1957, British slang, perhaps from earlier naval slang meaning "slightly drunk" (1948), from notion of a thump ("bonk") on the head.

Online Etymology Dictionary, © 2010 Douglas Harper