Naked Walker
A 45-100 year old male who walks around gym locker rooms with no clothes on. May also be spotted with a towel in hand (rather than around body), slip on sandals, and soap on a rope. Beware: naked walkers love to start conversations with their fully clothed neighbors...
When I walked into the locker room, a few naked walkers bumped into me, I think one's cock hit my leg...