batty
The origin and history of batty.
Etymology
From "bat" (the animal) plus "-y," popularised by the phrase "bats in one's belfry," describing bats flying erratically — first used to mean "insane" in the early 1900s.
Class of 1900
batty first entered the language around 1900. Other words from the same year:
See the full Class of 1900 →