A person that is such a fucker, they ruin Christmas.
"Wow, Ernest, thanks for not being a Christmasfucker. Now go to camp."
"Wow, Rudolph, you are also not a Christmasfucker."
"Kevin, you spilled Dr. Pepper all over everything at our Christmas party or whatever, and got your hair lit on fire at the Christmas pageant. Look what you did you little Christmasfucker. I think I shall leave you home alone."