An app and social media website for people to talk about their neighborhoods. It's mostly filled with boomers complaining about shit that doesn't matter and that one really passionate guy that cares about everything. Its most useful feature is a marketplace type section to list things you are selling.
Gotta get my mom off nextdoor, I don't think it's healthy for her.
by LizardBoi October 21, 2021
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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, 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 have a bad case of Nextdoor Syndrome!"
by JChar!es March 25, 2020
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your neighbor's all-caps alert on NextDoor app
when Carol's phone buzzed with an urgent alert she eye-rolled cuz it was another hysterical post from Carl. "there's our Nervous NextDoor Nancy hearing gunfire again" she welped.
by Uncle Joosie January 21, 2020
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