PFP or proper fuck placement, a term coined by an article writer Meathead. This term is usually used when talking about Trent Reznor or the main person in the band Nine Inch Nails or NIN. It deals with how Trent uses the word fuck in songs and interviews.
good pfp: I want to fuck you like an animal
bad pfp: I hate fuck band Good Charlotte. (the cannot be replaced with fuck)