A behavioral disorder in which one determines anybody and everything is suspicious and troublesome. Usually accompanied by an increasing hate for the homeless community, city council members, and airplanes flying at night. Syndrome generally occurs after joining Nextdoor.com, a social media website.
Nextdoor member #1
"We used to get these people coming up to us in parking lots where we were shopping. Scams all of them!"

Nextdoor member #2
"Lol , listen to you....lol....you have a bad case of Nextdoor Syndrome!"
by JChar!es March 25, 2020
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