A severe condition that occasionally afflicts songwriters, it is characterized by using every available rhyme known to man, often in a way that renders the work a bunch of nonsense.
"Some brimstone baritone anticyclone rolling stone preacher from the east
Says, "Dethrone the dictaphone, hit it in it's funny bone,
that's where they expect it least"
And some new-mown chaperone was standin' in the corner,
Watching the young girls dance
And some fresh-sown moonstone was messin' with his frozen zone..."
(lyrics from "Blinded By The Light")
That is one of the worst ever known cases of rhymitis