A person who endlessly denies that they fap when they are questioned about it....but when they get home.....they proceed to fap.
Me: Do you fap bro? I know I do when I get the urge
Guy: Hell no you loser! I have too many girls on my nuts for that
Me: (This guy is probably a closet fapper)
(Later that night) Guy: What porn shall I view tonight?