Porn, smut, skin flick. A highly common colloquial truncation of the noun порнография (pornography), formed by taking the root порн— and adding the expressive, informal suffix -уха. In modern Russian, it is the standard slang term for pornographic content.
В Ингушетии 80% интернет-трафика составляет порнуха.
Porn accounts for 80% of Internet-traffic in Ingushetia.
(Артемий Лебедев @ ЖЖ, 09/2010)
