The 'Who the Fuck Is You?' meme is a popular reaction image and video clip used to express confusion, dismissal, or a complete lack of recognition toward someone trying to act familiar. Often associated with various hip-hop personalities and viral social media clips, the phrase captures the essence of main character energy combined with total indifference. It rose to prominence on platforms like Vine and Twitter as a go-to response for unexpected DMs, strangers acting like friends, or minor celebrities trying to exert authority. Today, it remains a staple in the internet's arsenal of 'clapback' humor, perfect for situations where the only appropriate response is a blunt questioning of someone's relevance.