a popular Hindi curse word meaning to 'fuck your sister'. It's used very often in India and most of the time, when it is said, it's literal conotation isn't taken seriously.
Origin of this word is in Urdu however it is also spoken in Hindi. Literal english translation "Sister Fucker".
used for e.g I want to fuck your sister or it was a pleasure fucking your sister, or your the kind of guy who will fuck his own sister, or your sister is a slut or whore and fucks everyone.