Also known as the O-Face, the term ahegao dates at least as far back as the early 1990s. Pornographic magazines used the word to describe the facial expressions of female live-action porn actresses during orgasm. In the same context, ahegao was used in some postings at 2Channel and its sister community for adult content, BBSPink, as well as in pornographic videos at adult e-commerce platforms in the early 2000s.