Three people are sitting on a motorcycle while the other is driving and the other two are fucking each other with a slight curvature of the SIXTY NINE position eating ass and dicks. Usually used for three gay guys.
The Female version of a Rusty Trombone which involves a female getting rimmed while a vibrator is inserted into her vagina mimicking the vibrations of a motorcycle. It is also customary for the giver to push his or her lips together and make motorcycle noises into her anus.