noun: Someone, usually attractive, who flirts with or otherwise enamours a person, but does not reciprocate their love.
noun: Something that causes sorrow, grief or extreme disappointment.
noun: (sports) A match which ends in defeat for a promising player or team.
noun: (role-playing games) An independent role-playing game that attempts to fix various perceived design flaws in an established RPG, but whose few innovations will not reach a wide audience due to its lack of marketability.