Wiktionary
n. Comics or animation of Indian origin primarily featuring Indian sexuality.
Wikipedia
Kirtu is a word that, by association, has become synonymous with sexually explicit comics or animation originating in India that depict modern Indian sexuality. The common noun is derived from the domain name of the popular pornographic cartoon website Kirtu.com, although as a proprietary eponym it is often used to refer to Indian cartoon pornography in general, much like hentai is used to denote sexually explicit or pornographic comics and animation from Japan, particularly anime, manga and computer games.It become the major source of inspiration to many people to make a phonographic cartoon or sex stories. After banning of the many sex feeding site in India in 2015, some blog become most popular due to their sensual stories.
Pornography is illegal in India, and although it is available virtually anywhere, especially in areas where duplicated material is already being sold, it is generally of the softcore variety and typically of low quality.
Hardcore pornography involving actors and models, both on film and in photographs, is much more difficult to come by, and almost impossible to produce and distribute domestically because of the ban. Therefore, cartoon pornography is an increasingly popular alternative in India to hardcore content performed by people. Although various websites and print outlets besides kirtu.com exist, animated pornography in general is often referred to simply as "kirtu".