"erohentai" is a combination of the Japanese words "ero" which means "erotic" or "pornographic", and "hentai", which literally translates to "abnormal" but in the context of adult anime, it refers to "perverted" or "pornographic". So, "erohentai" is a term used for adult, pornographic anime content. The term can also be seen as "Ero Hentai", where "Ero" is an alternative writing for "Erotic". It is commonly associated with Japanese anime and manga content which contains explicit sexual themes and scenes.