Icydick is when you get Icy Hot, Bio Freeze, Vix Vapor rub, or similar product on your balls or dick and now you have Icydick. That shit hurts. This could have been accidental because your dick itched while some of this stuff was on your hand, or because you're weird and put it there. Whatever.
The state of having an exceptionally cold penis; usually accompanied by extreme pain. Icedickle commonly afflicts distance runners who are overly optimistic about the weather.
John was unprepared for the cold, windy race conditions, which resulted in a raging case of icedickle.