Jabberwocky was a poem by Lewis Carroll, published as part of Carroll's Through the Looking-Glass. The poem was about a boy killing a monster, and contained a lot of nonsense words.
While working on Bessie, the Third Doctor sang the first few lines of Jabberwocky. (TV: Doctor Who and the Silurians)
During his confrontation with Light, the Seventh Doctor mentioned bandersnatches and slithy toves, which were creatures from the poem. (TV: 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. (PROSE: The Nightmare of Black Island)
Heather Lake helped her young daughter Annabel read the poem. (COMIC: The Broken Man)