"If Looks Could Kill" is a phrase often used to describe a situation where someone's intense gaze or expression seems to convey strong emotions, such as anger or disdain. It suggests that the person's look is so powerful that it could metaphorically "kill" someone, highlighting the impact of non-verbal communication. The phrase has also been used in various forms of media, including movies and songs. For example, it is the title of a 1996 film featuring Richard Grieco as a secret agent. The expression captures the idea that appearances can be deceiving and that emotions can be conveyed without words.