A dirt biker is a different breed of human. Complete bad ass hell raisinmachine. If you define yourself as cool you best have a mullet and have a dirtbike.
Look at the hunk of a dirt biker. He must have a mint mullet!
going into a public toilet then placing the human feces on the wall's of the cubicle and rubbing the excess onto the toilet paper and sticking it also on the walls.
have you seen the dirty bakery in the toilet block downstairs today ?