Meaning of “murige”(無理ゲー)
It means “almost impossible”.
“murige” is an abbreviation of “muri na geimu”(無理なゲーム).
“muri”(無理) means impossible.
“geimu”(ゲーム) means game.
So original meaning is “the video game which is too hard to clear.”
But we use this word as a slang when we feel “it’s hard to do.”
A: The deadline is until Thursday, right?
B: Seriously? Oh, it’s murige isn’t it?