Adj. can be used as a noun.
Moronic people who live in cities/towns with little to no knowledge of practical life skills. Usually incapable of surviving on their own. Not used to physical labor or outdoors, yet have large egoes and superiority complexes, considering themselves better than non-townies.
word originates in rural southern Illinois.
(townie) "Hey can you tell me where they grow chocolate milk
(non-townie) "You dumb ass townie."