The term became a synonym for the nation of Pakistan in 2010 after news sites reported that Pakistan is finally no. 1 at something: Watching porn on the internet!
According to Google Trends, Pakistanis are particularly interested in child sex, rape sex, animal sex, horse sex, donkey sex and of course camel sex making them world leaders for those search terms in Google. To keep the competition fair for smaller countries (Pakistan has 173 million citizens), only searches per citizen were considered.
Despite Pakistan's long and active history of internet censorship, the government has no problems with rape, child and animal porn as long as it does not criticize slam.
No. 1 Nation in Sexy Web Searches? Call it Pornistan - Fox News
Makhdoom Syed Yousaf Raza: Hey, want to come to my party tomorrow evening? We'll be watching some child sex and camel sex movies.
Bill: You sick Pornostani bastard!