verb - the action used to move all of the tobacco in a can of dip to one side to increase the ease of getting a quality pinch. Usually makes a snapping noise when the forfinger hits the can. (the noise is not nessisary, but will earn style points.)
Also used to show an acurate portrayal of how much dip you have left in your can.
"I pack a dip so i know exactly how much is left in my can."
"Hey man, Can you pack a dip for me? I need a pinch"