A "mental illness" in which the afflicted avidly and blindly loves the "evil clown" character depicted in horror movies, haunted attractions, video games, and Halloween, even encouraging others to love it too, despite the negative impact on the world the "evil clown" character has. The afflicted will express defiance when asked to change their ways, believing nothing is wrong with them. The term comes from a term The Joker uses in Batman: Arkham Knight.
Mad Clown Disease reached one of its highest points when Stephen King's "It" hit the big screen in the 20'teens, when everybody started to go wild over Pennywise the Dancing Clown, despite the negative impact he has on the world. The syndrome spread like cancer and still does today.
by Info2go August 28, 2025
Get the Mad Clown Diseasemug. A dumb b**** who either still has feelings for their ex or someone they talked to or someone who makes a dumb mistake
by we_real_20737 December 16, 2019
Get the Clownmug. Taylor Swift fans who think that Taylor Swift will do something at a certain time and they are wrong.
We swifties really were clowning around thinking that Taylor Swift was gonna do something on New Year’s Eve.
by Bi swiftie for life January 1, 2023
Get the Clownmug. by The crazy clown October 5, 2019
Get the Smoking Clownmug. 
You.
by Ronald Childmolester McDonald November 6, 2020
Get the Clownmug.