Thicktown
From Tardis Wiki, the free Doctor Who reference
Thicktown was a hypothetical town created by the Tenth Doctor as a way of insulting a clockwork droid while on board the SS Madame de Pompadour. Thicktown was located in the hypothetical country of Thickania, also created by the Tenth Doctor. (TV: The Girl in the Fireplace [+]Loading...["The Girl in the Fireplace (TV story)"])
Behind the scenes
The town's name was presumably derived from the word "thick," meaning in this case, "stupid."