James (Jemmy) Moore Smythe (1702- 1734) was an Engligh playwright. He had a reputation for foppishness and big spending. Despite inheriting substantial estates, he ran up large debts, and died in poverty.
In 1727, he wrote his only play, The Rival Modes. It was performed by the Drury Lane company but was not well received, and ran for only six nights.
In the second act, Smythe quoted eight lines of Alexander Pope's poetry, without giving credit to Pope. It appears that Pope had given and then revoked permission for the use of the lines, but Smythe used them anyway.
Pope used his subsequent works to exact revenge. In his The Dunciad of 1727, he describes Moore as a ‘phantom poet,’ a vacuous nothing who works book sellers into a frenzy with his flashiness, but turns out to have nothing but stolen verses. Pope renewed the attack in 1730, writing in The Grub-Street Journal:
A Gold watch found on a Cinder Whore,
Or a good verse on J--my M-re,
Proves but what either shou'd conceal,
Not that they're rich, but that they steal.