Weeaboo
"Weeaboo" is a noun/adjective derived from a Perry Bible Fellowship comic, reaching internet stardom after the term was used as a wordfilter for "wapanese" on /b/. Although used in the comic as a nonsense word, it has since become synonymous with "wapanese". Weeaboos are people who believe that Japanese stuff is better simply because it is Japanese, and typically have an unhealthy obsession with the culture and media of Japan (such as anime) while simultaneously managing to know very little about it.
/tg/ has a tendency to use the word in a derogatory manner to describe anything vaguely Asian in origin or inspiration. This often incites the ire of fa/tg/uys who insist on the more precise definition of the term, resulting in rage all round.