Hodor

Listen up, buttercup. This joke is short and dumb, kinda like you after your 12th participation trophy. "Hodor" is a character from "Game of Thrones" who can only say the word "Hodor." The joke is that God, who is supposed to be all-powerful and stuff, is just saying "Hodor." It's funny because it's unexpected and makes God seem kinda simple, like you trying to understand quantum physics.