Top definition
A car with whom you happen to drive at the same speed during an extended road trip, thus sharing the road with them for several hundred miles, and forming an unspoken connection.
It was a pretty desolate drive to visit my friend out at (insert state school), but I became roadmates with a red Ford Focus for two hours, I think a part of me died when it turned off the exit.
by thelonelyroad January 16, 2014
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