The Rice University Neologisms Database

Crazy, ridiculous, stupid, foolish. 'Baka' came into English in a manner similar to that of 'kamikaze'. 'Kamikaze' was borrowed into the English language from Japanese and means in English what it means in Japanese; namely, suicidal. 'Baka' is Japanese for 'stupid' and was borrowed into the English language from Japanese through manga and anime since within the books and shows they do not always translate short phrases or insults from the original Japanese to English. 'Baka' is typically used to refer to something wildly stupid or unbelievable mostly by those who read a lot of manga or watch a lot of anime, though it has spread to other college students. 'Baka' was probably first used outside of comics by teens or young adults who thought it would be a cool way to talk and sound very hip or ahead of their peers and is used very informally, not in any serious discussion about, say, class materials, but instead in discussions about popular entertainment and the like.