The 'Bye Bye' Mewing Shh meme is a viral sensation rooted in 'looksmaxxing' internet culture. It features a person performing a 'shh' gesture followed by pointing to their jawline, indicating they are 'mewing'—a tongue posture technique meant to define the jaw. Usually paired with the song 'Bye Bye Bye' by *NSYNC, the meme represents a humorous way to ignore others to focus on one's physical self-improvement. It exploded on TikTok and Instagram in early 2024, becoming a universal sign for being 'locked in' or simply flexing superior facial aesthetics while staying silent.