En evil person, apt in manipulating people surrounding him. A massad will often hide truths even to his friends in order to take advantage of them, especially when it comes to fantasy league, organizing stag-dos or playing board games.
(fig.) Pulling a massad - being subject of a play from a massad

Massads are truly amazing people beautiful and extremely inteligent. They are very selfless always trying to help their fellow man. They will make you smile and laugh non-stop. If you ever find yourself in the presence of a Massad cherish that moment because you are truly blessed!