Christmas Baby? Has a nice ring to it if you ask me, in fact it sounds lovely. Seriously, I wouldn't mind being called a Christmas baby by some bird on the shop counter. How could that get you down?
I don't like being called that because Im not a baby, and it does get tiresome. Just like this girl who I knew whose name was Robin, she didn't like it when people made Batman and Robin jokes about her name, she had been hearing that all her life and she was tired of it and if you did make such a joke she would let you know that it was aggravating.