Spanish abbreviation for "Ni puta idea" - No fucking idea. In order to not use coarse language, some people say that the meaning is "No poseo información" - I don't have information.
1. Mary:-> Sabes en donde dejamos los condones? / Do you know where we left the condoms?
John:-> NPI
2. Charles:-> Será que Mary quiere salir conmigo? / Do you think that Mary wants to hang out?
John:-> NPI, pregúntele! / NPI, just ask her!