Weab is a slang term used to describe someone who is obsessed with Japanese culture, especially anime and manga. Synonyms for this term include otaku, which is a Japanese term with the same meaning as weab, and Japanophile, which refers to someone who has a strong interest in Japanese culture as a whole. Other similar terms include anime fan, manga enthusiast, and subculture nerd. However, it is important to note that not all fans of Japanese culture are necessarily weabs or otakus, and using these terms indiscriminately may come across as derogatory or offensive.