QUASH: To nullify, void or declare invalid.
QUID PRO QUO: Latin phrase that means what for what or something for something. The concept of getting something of value in return for giving something of value. For a contract to be binding, it usually must involve the exchange of something of value.
QUID PRO QUO SEXUAL HARASSMENT: Where an employee is threatened with a demotion (or promised a promotion) in exchange for "sexual favors." It usually comes from a supervisor or other person in a position of authority.
QUITCLAIM DEED: A deed that transfers the owner's interest to a buyer but does not guarantee that there are no other claims against the property.