One of my favorite bits of all time:
Fry: Yeah, it really puts you in the Christmas spirit.
Farnsworth: What-mas?
Fry: Christmas. You know? X-M-A-S.
Leela: Oh, you mean Xmas. You must be using an archaic pronunciation. Like when you say “ask” instead of “aks”.
That’s from “Xmas Story“, Futurama Season 2 Episode 8.
Happy Xmas!