Conan O'Brien has made a reputation for himself by immersing himself, for better or for worse, in the larger video game landscape with his series Clueless Gamer.
Ice-T is a massive fan of the Call of Duty franchise and considers himself an avid FPS player. How would an Ice-T normally be found celebrating a win in a Team Deathmatch type situation? Why, he'd pull his dick out in the middle of his living room, that's how.
Ice refers to this classy display of showmanship as the 'Dick Dance'.