dagger eyes
Dagger eyes are when someone gives another person the nastiest look, like they want to rip their face off with their eyes. It’s usually for people who think they’re cool but are really just a waste of space.
He gave me dagger eyes when I said his haircut was worse than a donkey’s tail.
She gave him dagger eyes after he called her a ‘weirdo’ during lunch.
My brother gave me dagger eyes when I told him he lost the video game battle.