An act of vandalism. The perpetrator, while hanging out of the window of a Sedan, grabs a garbage bag placed on the side of the road for pick-up and drags it down the street until the bag breaks scattering the thrash.
Caution: act may cause extreme moments of euphoria.
"Stubbie and the gang went out grouching the evening before, trash was scattered all up and down Mott Park."
the same as regular grinding but when both grinders are facing eachother. can occur in a sandwhich with a girl in the middle and one guy in front of her and one guy behind her.
i was front grinding with this guy at a party and i swear i felt him get a boner