Ahegao is a Japanese term for an exaggerated facial expression often depicted in adult manga and anime, typically characterized by rolled-back eyes, an open mouth with the tongue out, and a flushed face. While its origins are rooted in erotic media, the expression transitioned into mainstream internet culture as a recognizable trope representing extreme pleasure or sensory overload. It became a viral sensation through TikTok challenges, gaming communities, and ironic cosplay, where users mimic the face for comedic or shock value. Today, the Ahegao face is widely used as a reaction image to represent intense excitement, accidental over-exaggeration, or satirical takes on anime aesthetics.