The definition of bonkers is slang for crazy.
The way someone feels when lacking sleep, yet they still have a million things to do is an example of bonkers.
Slang crazy, enraged, etc.
Origin of bonkersprobably ; from British bonk, obsolete military slang, “to bomb,” echoic
Crazy: “When word spread that free gas was to be found, the populace, as expected, went bonkers” (Washington Post).
Origin of bonkersOrigin unknown.