Completely crazy or wild in a fun or shocking way.
British slang from the 1950s, possibly derived from 'bonk' (a hit or strike), suggesting the idea of being hit on the head and going mad. The origin is uncertain but the term gained popularity through military and working-class usage.
The fact that 'bonkers' started in British slang but is now understood worldwide shows how internet culture spreads words across countries—a term from 1950s military barracks is now used by teenagers everywhere.
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