a slam, usually from skateboarding, directly on the hip. the hip will then swell and become inflated with a water-like substance, leading it to feel like a balloon. extremely painful and often debilitating for a few days. hippers take a notoriously long time to heal and often lie dormant, waiting for the next slight unexpected tap to flare up.
treatment: rest, TV, THC
"i went for a backside 50 in the deep end and fell from the coping to the flat. now my hipper's back and my sesh is done today."