Definition of apple of discord
(noun)
(classical mythology) a
golden apple thrown into a
banquet of the gods by Eris (goddess of discord--who had not been invited); the
apple had `for the fairest'
written on it and Hera and Athena and Aphrodite all claimed it; when Paris (prince of Troy) awarded it to Aphrodite it began a
chain of events that led to the Trojan War