b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Jack Harkness - Bubblebut [Exp.] Reject RD2 [Type] Ref Pun [In-joke] 
Based on a video diary in which John Barrowman dances and sings "I like big butts..." by Sir Mix-a-Lot Most jokes should be taken at ass value. How I Learned to Love the Bum: A play on the card title How I Learned to Love the Bomb, itself a reference to Dr. Strangelove.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke