To get high on marijuana, or pot or whatever else you want to call it. It can take the place of any descriptive word for being high, such as stoned or baked.
The act of putting one or many bullets in to someone. Taken from the Daily Show when John Stewart referred to the act of Cheny peppering his friend with a shot gun as Seasoning.
This fool didn'tknow who he was messing with so me and the boys got in to the Escalade rode up on him and seasoned his ass.