1)Those annoying people who walk up to your door, driving the dog crazy and making you think someone's there, only to hang some advert on your door and leave.
A young girl with cum on her face. Reference to the similarity between male semen and wallpaper paste, such that would accumulate on the face of an inexperienced wallpaper hanger.
A Counterfeiter. Not necessarily an individual who specializes in counterfeit money, but moreover an individual who specializes in screwing an established system due to counterfeit documents.