Guitarists and other musicians that use effects pedals will often post pictures of their new pedals to Facebook groups and forums with the acronym NPD.
Non-Picturable Dick. Used to describe a guy who you could never picture having sexual affiliations with, and you can't even picture what his penis looks like.
Girl 1: "Do you think I should go farther with ___?"
Girl 2: "No way.. hes fo shoooo an NPD I can't see that happening EVER."