Ahegao, also known as O-Face, is a word used in Japanese pornography. The ahegao face can be defined as the exaggerated facial expression of female characters during sex. It is mainly a style of drawing used in pornographic anime and erotic manga. However, it is not exclusively used in this kind of adult content.
The facial expression is typically depicted with an exaggerated style, where the character is drawn with a red face, crossed eyes, a protruding tongue, sweat and an intense facial expression. It can depict different levels of sexual arousal, up to and including orgasm.
The word ahegao can be defined in English as "moaning face".
In Japanese, the correct pronunciation of ahegao is ah-heh-gah-oh.
The vowels in ahegao are pronounced as short vowels. This means that the both "a"s are pronounced with a soft "ah" sound. The "e" is pronounced with an "eh" sound. The final "o" is pronounced with an "oh" sound, which is also emphasized.