Streakboarding

The act of skateboarding naked in public. Usually as a shocking prank, as a dare or as a form of protest. The most notable instance of streakboarding was in the simpsons theater movie where homer challenges bart to streakboard to Krusty Burger.

The word is a portmanteau of the words Streak (running naked in public) and skateboarding

I was walking to the Library one day and I saw a man streakboarding in the distance.