You can help confirm this entry by contributing facts, media, and other evidence of notability and mutation. According to a forum post in Nico Nico Pedia 's entry for Ahegao  , it's confirmed that the term had been already used in porn magazines to simply explain porn actresses' face of pleasure in early s. Used in the same context, it also made appearances on a handful of posts in 2channel and its sister board community for adult contents BBSPINK as well as descriptions for porn videos on adult e-commerce sites in the first half of s. Meanwhile, according to Japanese blog posts WebLab. He also analyses that image board communities Futaba Channel 2chan and Pixiv , where its users started to heavily use this technique for pure jokes like Ahegaokin around , also had a critical role to spread the concept on the internet.
A more realistic variant is known as ikigao. According to a forum post at Niconico , [ unreliable source ] the term ahegao dates at least as far back as the early s. Pornographic magazines used the word to describe the facial expressions of female live-action porn actresses during orgasm.