Low-quality doujinshi that includes bad artwork and/or use of stock character dynamics (either male/female stereotypes of seme/uke dynamics) at the expense of characterization. Generally generic pornography.
"So did you read the scans of that SasuNaru doujinshi I sent you?"
"That was more like doujinshit, Naruto wouldn't cry because he was in love with Sasuke."
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 traditionaldefinition
Doujinshi is amateur manga publications, featuring either a cast of original characters and plot or characters from another manga or an anime (a 'fan manga'). There's all sorts of doujinshi, though it isn't as widely circulated as more popular mangas, such as CLAMP works. Doujinshi is often cheap but is just as good as regular manga (well, some of the time...), and is sold on eBay, jpqueen.com, and other sites. Even if it isn't your bag, it's nice to take a peek and see a fan's perspective on Naruto... kinky pairings, too.
A Japanese word meaning a work published by a specific interest group for other members of that interest group. Doujinshi usually refers to fan made manga or soft. Because of the copyright laws in Japan fans can get away with making and selling doujinshi featuring their favorite characters from anime and video games although doujinshi also often times feature original characters and stories. A common misunderstanding is that all doujinshi are x-rated fan works but this is not always the case.