1. The level of high an individual gets that makes them feel like she or he is flying like superman.
2. The level of high when an individual has smoked so much marijuana, that if more was inhaled, the individual would not reach any level higher of his or her highness.
Dude, I'm am superman high right now.
Yesterday, Jarell was da da da...superman high.
Did you hear about George last night? He was so blazed that he was flying. Big superman high.