This has got to be the goofiest saying I've ever made up. tyum. All lowercases. Nothing else. It means absolutely, NOTHING! It occurred when I was playing R.E.P.O with a friend, and I was typing in chat with the t button, yum. Idk why, but were were messing around and I typed yum in chat. Well, I then accidentally pressed t twice, and it went like this: *t to enter chat* *accidental t* *types the rest of yum*. That's it. Then I spammed it in chat and he got mad. He threw me off a balcony XD
Song called tyum. yes fr.