Cod

Dr K’s description of something as being “cod” indicates that he believes it to be fake, as in the "cod spirituality" of Glass in The Revenant. Alternatively, if "cod" is followed in discussion by the words "and chips" then they were probably discussing what to have for tea on the way home from the cinema (definitely not what to have during the viewing of a film as this would be a breach of the Moviegoers Code of Conduct).

And always remember, “In cod we trust”, though obviously we shouldn’t. It is perfectly fine to eat cod, because being a fish, they never took the time to evolve onto the land where the films are.