“We’re all bonkers, we are just bonkers at different times”

In British slang, “bonkers” means crazy, mad, or silly. 

Example: “That’s a bonkers idea; it’ll never work.”

Alternative meaning: It can also describe extreme enthusiasm, such as “going bonkers over that video game”.

Origin: The word is of unknown origin, but may have come from the word “bonk,” meaning a blow to the head