Unmentionables

Within the Dalek City, described the Doctor's TARDIS to the Daleks as "the dog's unmentionables", doing so while tickling a nearby Dalek's sense globes. (TV: The Magician's Apprentice)
== Behind the scenes ==
Michelle Gomez confirmed on Twitter that her tickling a Dalek's bumps when referring to the TARDIS as "the dog's unmentionables" was improvised. https://twitter.com/bbcdoctorwho/status/648186904089919489
== Footnotes ==
Category:Jargon, slang and colloquialisms