(pawr-ney-doh) short form of Porn Tornado.
A sexual move performed by the female partner whereby she lines up in the cowgirl position and lowers herself onto the erect penis with a circular motion. Can also be performed in the reverse cowgirl position.
Murk: "How did your date go last night?"
Paul: "Dude, she did the Pornado, how do you think it went?"