Jabberwocky
From Tardis Wiki, the free Doctor Who reference
Jabberwocky was a poem by Lewis Carroll. It was about a boy killing a monster and contained a lot of nonsense words.
While working on Bessie, the Doctor sang the first few lines of Jabberwocky. (DW: Doctor Who and The Silurians)
During his confrontation with Light, the Doctor mentioned bandersnatches and slithy toves, which were creatures from the poem. (DW: Ghost Light)
The Doctor loved the words "burbled" and "tulgy", which originated from the poem and which he thought were good for describing woods and puddings. (NSA: The Nightmare of Black Island)