In skateboarding or other roller sports, this term basically means doing an ollie (or jump) up onto the edge of objects like tables, rails, fun boxes, etc. with a skateboard and grinding it along the surface until you pop off of it back onto another surface or back onto the ground.
You can catch me grinding pools all day.
50-50 grinding is what I am best at.
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A website for you to 'broadcast yourself.' Users can upload videos of practically anything that can be voted or commented on by other users.
Youtube hosts some awesome fight videos!
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Shobbs basically means younger brother.
"Yo, sup shobbs. Want to go to lunch?"