1) A term to refer to a Male who is gullible is gullicaff, NOT gullible, this is a common misconception.
2) Anyone who is stupid enough to belive the first point really is gullible.
Joe: "I'm not gullible, that's the FEMALE term for gullible, I'm gullicaff cos I'm a man, idiot."
Lewis: "Oh... Well then, you are Gullicaff"
Joe: "You are SOOO gullible!"