Short for doujinshi. Officially it means any independently published manga, but it's widely used around the interwebs to refer to hentai works.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Japanese word which literally means a group of people with the same interests, but it is often used as a shorthand for doujinshi.

Dōjin is a japanese word which is used to describe a group of people with same interests. here is it's kanji (同人). please get don't get it confused with Dōjinshi (同人誌) which is used to describe fanmade works which are created by people who have similar interests. while you may see these words used to describe Hentai manga but keep in mind that this is the traditional definition

Holy tomes that must be followed in order to gain spiritual guidance

Shortened form of worddoujinshi/word.

Fan-made published versions of anime/manga. Almost always involves porn. The best one I can recommend to those new to these are Itachi x Sasuke, they make a hot yaoi couple.

Some doujins don't keep true to the original art style though. Stay away from those ones as they are stupid. Only doujins with the same art style (meaning they could be mistaken for the real thing) are acceptable!!