The act of procrastinating by any means that involves parkour. This means training parkour, thinking about parkour, dreaming about parkour or watching others do parkour in person and in any form of video, especially on youtube.
Parkourastination stopped me from writing my five page paper while I was in the library.
Those guys that hangout in the the park and play frisbee. They usually drive older camaros, firebirds, etc and wear really tight jeans. Hightops are a must shirts are optional.
They were common in the early 90's. They can also be called wombats.