<p><strong>Noun</strong></p><ul><li>Informal: a person who compromises their personal values, integrity, talent, etc., for money or personal advancement</li><li>Informal: a person who betrays a cause, organization, or the like; traitor</li><li>an act or instance of selling out</li><li>an entertainment, as a show or athletic event, for which all the seats are sold</li></ul>