The act of a man receiving "roadhead" (oral, blowjob, bj, head, etc) from the driver of the car while sitting in the passenger side seat, while the car is in motion. This can be achieved by cruise control or telling the giver, in the drivers seat, to hit the gas or brake as the receiver steers, from the passenger side seat. Highways are the optimal.
John got suicide roadhead from Susan on the 10heading home.
By Kim
Texas Roadhead
The experience you get at the Texas Roadhouse... When a girl lowers her head below the dashboard and indulges on a certain shaped object. ;)