Zo zot als een achterdeur*

* As crazy as a back door

Dutch | Flemish Flanders, Belgium

Expression USED On Occasion BY Almost Everyone

used to refer to someone who is very crazy, or behaving like they are.

"Caligula was zo zot als een achterdeur: hij benoemde zelfs zijn paard tot consul!"

"Caligula was as crazy as a back door: he even made his horse consul!"