Yes, it was his idea of being funny. Unfortunately plenty of people actually thought he meant it! (can you really believe it.)
Clarkson was just being Clarkson. ****
Now there is a word that descibes him perfectly but I'm not allowed to type it here.
I can say though that the word I'm thinking of describes him perfectly in both behaviour and attitude when used as a prefix like ****ishness and ****itude.