if looks could kill

An expression used when someone makes an angry or unpleasant face at someone, indicating that such an expression represents hostility. And the way she looked at me when I mentioned her father in my speech? Yeesh, if looks could kill. A: "Emma doesn't hate you." B: "Oh, please! If looks could kill, Emma would have taken me out when I showed up!" Oh man, if looks could kill! Believe me, I wouldn't have mentioned it in front of her parents if I'd known she'd lied to them about it!

if looks could ˈkill...

used to describe the very angry or unpleasant way somebody is/was looking at you: If looks could kill, she thought, seeing the expression that came over his face when he saw her, she’d be dead on the pavement. ♢ I don’t know what I’ve done to upset him, but if looks could kill...