The definition of bonkers is slang for crazy.
(adjective)The way someone feels when lacking sleep, yet they still have a million things to do is an example of bonkers.
See bonkers in Webster's New World College Dictionary
adjective
Origin: prob. < Brit bonk, obs. military slang, “to bomb,” echoic
See bonkers in American Heritage Dictionary 4
adjective
Origin:
Origin: Origin unknown
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