Look daggers at somebody
Definition 1 of 1
Pro Tip 1/3Anger Intensity
Conveys intense anger non-verbally; stronger than a mere frown or glare. 
When he broke her favorite vase, she looked daggers at him.
Pro Tip 2/3Non-Physical Aggression
Represents a way to express anger without using physical action. 
She looked daggers at the comedian who insulted her during his show.
Pro Tip 3/3Silent Message
Useful in silent situations where you want to show anger without speaking. 
During the quiet ceremony, she looked daggers at the noisy guest.