The Grinch

Andy Hansen made a reference to The Grinch. (PROSE: In Search of Doctor X)

Ryan Sinclair called Krampus a "regular Grinch". (COMIC: Holiday Special)

Behind the scenes
The Grinch is the titular character of the Dr Seuss book.

Benedict Cumberbatch voiced the character in the.

The book's title was used as a possible answer in one of the competition questions in DWM 558, the question being "Which of these classic films is also the title of a Doctor Who Christmas special?"