1988 film heavily debated as to whether it's a Christmas movie (3-4)
I believe the answer is:
die-hard
(Other definitions for die-hard that I've seen before include "Person who is unwilling to change even when there are good reasons to do so" , "One who continues in spite of opposition" , "Person who resists change" , "Stick-in-the-mud" , "One strongly opposing change; I'd heard (anag.)" .)