this is something people say when you're NOT FUNNY
John: Hey, Kian. your mom
Kian: -_-
Annoyed , Sick Of , Dumbfounded
Player 1 : Hah You died. BY A LEVEL 1!
Me: I really don't care -_-
when you don't give a fuck/ knowing a single fuck about the current situation that you are currently in.
Now the proper way to use -_- is when you give a shit, important or not