When a group of less than 10 teenage boys, usually from a country town, drive up and down the main roads of the town, to check what the happenings of the town are.
Variations include pumping music from the car (music mainies) or riding bikes up and down (bmx mainies). Before a mate gets theirs P's the most common form of a 'mainy' is a walking mainy.
Nathan and the boys took mums pulsar for a drive down to town and tried some music mainies and reverse donuts.
when people from small hick towns (usually teens and some select older people) go back and forth numerous times on the mainstreet of their town usually waiting for everyone else to come downtown, just to kill some time or show off their trucks/ cars
when a group of adolescent male humans drive along the main road or 'main strip' in a city in a car, with the purpose of observing the local female humans, or to 'show off' the prowess of their motor vehicle
