m. a
word originally used in the British Navy, beginning around 1920, to mean slightly drunk or lightheaded. It later came to mean crazy,
insane or mentally unstable and is used in
reference to people, things or actions. The precise
derivation of bonkers is unknown, but it possibly originated from the
word bonk, which means a
blow to the head (from the
sound of a heavy
object striking a
hard surface or bony part of the
body).