suburmit 

Someone who, by choice, doesn't venture out of the suburbs. Like, ever.

"Don't bother calling him; he won't go to the show. It's downtown, and he's terrified of hipsters and the lack of parking. He's become a real suburmit."

suburmit by snobiwan May 16, 2009

Suburbitank 

An excessively large 4WD or AWD driven by suburban residents.

“When it’s slick, it doesn’t matter how many wheels have power, your suburbitank will plow right into Jan’s Prius.” —Lawrence KS Police Department

Suburbitank by SuburbitanksGalore November 28, 2018

suburbity 

Something between a suburb and a city; concatonate "suburb-city". Likely an adverb and used to modify an existing proper noun place name.

For example, "Rockville, Maryland is very suburbity" (i.e. neither exclusively suburb nor city)

suburbity by armchairquarterback November 26, 2013