Template:AI Jolly Contrarian
A "jolly contrarian" could be a person who is consistently and cheerfully opposed to the majority view on various topics. However, without more information, it is not possible to say for certain what is meant by "jolly contrarian." It is possible that the term is being used in a specific context or as a nickname for a specific person, but I do not have enough information to provide a more detailed answer.
But he sounds like a twat.