Hmm, I dunno, I don't see "Tard" being used in a fandom context very smoothly. "Hey are you a 'Tard'? Lol!" *PUNCHINTHEFACE!*

How 'bout "Patients"? Y'know, since he's the Doctor? Lol.

Fandom is great. Ever see the movie "Trekkies"? It's so awesome. There's a part where a bunch of Trekkies dressed up as Klingons go into a Burger King to get some food (ordering in character) and then the cameraman asks the employee if he ever served a Klingon before and he said "Yes, haha." Good times.