The story
Coined in or around 1848 by Edgar Alan Poe as tuckermanities (see quote below) from the name of Henry Theodore Tuckerman, an American author, plus -ity. Compare humanities.
Etymology from Wiktionary, CC BY-SA 4.0.
tuckermanity
Today it means: Poetry or literature, especially that which is excessively proper or moralist; literature by or in the style of Henry T. Tuckerman. Full definition →