This occurs when a person becomes sexually arroused and does not have time to masturbate. Therefore, the act takes place in a moving vehicle, usually on the way home.
Damn, that bitch Jasmine gave me blueballs. I think I need to pull a road rub.
A chrome cleaning stick used to take off many things from motorcycle chrome.
Thanks to road rub my friend's bike doesnt look like a hunk of junk.