H


 * verb: to have sex, not strictly limited to intercourse.
 * adj.: being sexually provocative, having a "dirty mind", or generally related to sex.

Example: H scene in the context of games refers to a scene with sexual behavior.

Pronounced as ecchi in Japanese, the term is believed to be derived from the first letter of Hentai, the romanization of the word "pervert" in Japanese. However, the word hentai in Japanese context can only refer to individuals, whereas H as an adjative can be used in just about any context.

In English context, Hentai is equivalent to H.