Stands for Post Nut Pant Grab...when a woman prohibits you from fleeing the scene after regretful sex by holding onto your pants when you try to "go to the bathroom".
Last night sucked staying over at her place, honestly nutted on her back and she still had the presence of mind to pull off a PNPG.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi