When someone rubs their scrotum against a dock (mostly wooden ones), which boats tie up to. These are the most sick and twisted people you may ever come across. They will not stopscrotum docking! Not even if their scrotum looks like a sea urchin from having so many splinters in it!
( ex. 1 )
Cameron: ewww! look at that guy, why is he doing that to the dock?!