When either the driver of a motor vehicle or a passenger in that motor vehicle reaches to the row of seating located directly behind them to participate in sexual activities with another passenger.
Chris: Hey Blake! did you hear Ryan gave Sam the blazer pussy grazer in the back of your car while you were driving yesterday!?
Tyler: I know, Sam is such a whore!
Blake: Wow, no way! what a dirty cunt!
Tyler: I know, Sam is such a whore!
Blake: Wow, no way! what a dirty cunt!
by John-Jacob Gingle-HeimerSchmit December 1, 2009