1. The act of mass spread hysteria of people becoming 'scary clowns'

2. The abnormal amount of clowns

3. The abnormal amount of lower IQ people walking around (1 to 45 is IQ range)
"The clowns are spreading and taking over! It's a clowndemic!"
by Lord Ash-y January 30, 2021
A collective group of people who frequently embarass themselves by saying or doing stupid things.
Aight, Smiffy's clowndem innit, mans verbalising bare madnesses.
by Gopnyk Boi January 12, 2021