Final answer:
The term 'otaku' refers to someone who is obsessed with anime, manga, and games and is seen as being out of touch with everyday social reality. It is a subculture within popular culture that has gained global popularity, particularly in Japan.
Step-by-step explanation:
In the context of the question, the term 'otaku' refers to someone who is obsessed with anime, manga, and games and is perceived as being out of touch with everyday social reality. This label is often used in a stigmatizing manner by the mainstream media. Otaku culture is a subculture within popular culture that has gained global popularity, particularly in Japan. Anime, manga, and cosplay are popular examples of otaku culture.