Also known as "Anime Terms You Should Know Part II". This time I tried putting it in alphabetical order.
Ahoge (Ah-h-oh-g-eh): This is that weird piece of hair that anime characters always have sticking up. Yes, it has a name. And guess what the translation is: Foolish hair.
AMV: These are those music videos you find scattered all over YouTube where people put their favorite scenes, fan art, or OTP across the screen while music they think is relevant but it really isn't plays in the background. It's short for "Anime Music Video". And I watch them all the time.
Bara (B-ah-r-ah): Bara is the version of YAOI that's actually created by gay men. Usually the characters are drawn more muscular and masculine as opposed to Boy's Love's usually effeminate characteristics. The word "bara" literally means "rose".
Cat Girl: Japanese: Shoujo no ko, Onna no ko, Shouneko (technically that would just be cat youth), Neko Onna, Kyatto gahru. My friend, Minae, says kyatto gahru, so I would go with that if you don't want to use the English. These are the girls who are pretty much entirely human but have cat ears and a tail and their faces may appear more catlike. They tend to exhibit more catlike behavior as well. It is a common trope in anime, and anime pictures.
Dojikko (Doh-J-ee-k-oh): Me. Also, it means a girl who is super clumsy used in a cute or humorous ways. In ecchi, these are the girls who always expose their panties because they trip or get stuck upside down or something equally ridiculous.
Dojinshi (Doh-j-ee-n-sh-ee): These are amateur manga works. They can be fan works, or original.
Fujoshi (F-ooh-j-oh-sh-ee): "Rotten woman". A female who is a fan of YAOI...so pretty much every fan of YAOI.
Guro (G-oo-r-oh): Also known as "ero guro", it is a form of hentai depicting graphic violence, often alongside graphic sexual content. This can include torture, murder, rape, etc, sometimes consensual but often not with the intent of sexual gratification of the viewer/reader. An example (which I have never seen and do not suggest ever looking into) is Mai-Chan's Daily Life. This is not the same as a violent manga, as it is specifically a hentai (or at least serves the same purpose).
Hikikomori (H-ee-k-ee-k-oh-m-oh-r-ee): Also me. A hikikomori is a person who attempts to isolate themselves from society, often associated with otaku and NEETs, but all three words are mutually exclusive. There are two types which do not have individual names: a person who is still involved with school and/or work but spends all or most of their free time alone and isolated, and a person who is a NEET and legitimately does not leave the house unless absolutely necessary.
Mecha (M-eh-k-uh): Also, "mech". It is short for "mechanical" and describes manga/anime that involves robots (super robots/super mecha focusing on the robots and real mecha focusing on the humans), often used for fighting, either controlled by humans or working on their own. Think Gundam or Transformers. This word can also refer to the robots themselves.
Okama (Oh-k-ah-m-uh): A cross-dressing man of any sexual orientation who is doing so for a variety of motives. Often they are straight up pretending to be a woman. This is usually used for humorous reasons but can be used in hentai.
Omake (Oh-m-ah-k-eh): Literally means "extra". If you've read a published manga (outside of a magazine) it is those silly little comic strips in the back that aren't important to the actual story and are usually put there for humorous reasons, or can also be an add-on for a DVD release, just like extras in western movies.
Otenba (Oh-ten-b-uh): This is pretty much just a tomboy.
Seme (s-eh-m-eh): The dominant in a relationship, often in terms of homosexuality. Generally, they will be stronger, more masculine, and protective of their uke.
Uke (Oo-k-eh): The sub in a (often homosexual) relationship. Often will be cuter, quieter (sometimes more shy), and more vulnerable. More physically feminine in appearance even in YAOI.
Yankii (Y-ah-n-k-ee): This is a youth subculture in Japan consisting of delinquent/rebel middle and high schoolers, often gaining a reputation for violent behavior. This is a unisex term and the characters/people can usually be characterized by altered school uniforms, strange hair styles or colors (bleached, colored, spikey, etc) and shaved or colored eyebrows.
YAOI (Y-ow-ee): Or, "YAma nashi, Ochi nashi, Imi nashi", which means, "no climax, no point, no meaning". Essentially, people use this term to mean any sort of male homosexual relationship, but the point of YAOI is more to be pleasurable to girls, sort of like how guys like to look up two chicks making out. It is not an accurate representation of the plights and issues that homosexual couples go through, nor is it simple, sweet, innocent romance (see my post "Don't Believe YAOI About Homosexual Rights in Japan) if I ever actually freaking finish that one). Rather, it is essentially over-glorified smut created by and for women. It's not always hentai, but it is usually sexually explicit in some form or another. Also known as "boy's love".
Youni (Y-oh-n-ee): This is pretty much the bisexual version of YAOI and Yuri that nobody knows about. It is a term used when a character (the gender is irrelevant) is involved with characters from the same and opposite sex. It doesn't have to be sexually explicit.
Yuri (Y-ooh-r-ee): "Girl's Love". The female version of YAOI, however, unlike YAOI, it does not need to be sexually explicit, although many are. These depict lesbian relationships, still usually without the accurate plights and discrimination faced by homosexuals, because the point of these are usually either to be cute, or arousing, and they are often not drawn by homosexuals.