A fork of Rural Dictionary
The mile highway club is the road version of the mile high club; pertaining to intercourse while in land vehicles instead of airplanes.
Cletus: “bro I just joined the mile highway club”
Schmidtt: “how did that happen?”
Cletus: “i picked up your sister to give her a ride to work and she gave me one back”
Schmidtt: “nice one bro”