Dicktation is the action of storytelling involved in detailing your latest sexual encounter to all of your friends. This normally requires graphic imagery and emphatic use of the hands, usually resulting in a rather grotesque and hilarious game of charades. This is also a technique frequently used by rap and R&B artists, like Ludacris, or Afroman.
-Note: not having a dick does not make one incapable of dicktation. Women are probably better at this artform than men are.
Verbally-created off-the-cuff word-compositions that the speaker would probably be perfectly capable of writing/typing up himself, but he's such a lazy dick that he gets his secretary to do it for him.
The reel-to-reel recording-system that the Watergate tapes came from was originallyintended as a dicktation-aid, since ol' Tricky was too much of a puffed-up "dick" to bother jotting down his thoughts and memos on paper.