It is believed that limericks date back to the 14th century and originated in the Irish town of Limerick. The limerick is a humorous five-line poem with two rhymes: one shared by the first, second, and fifth lines and the other shared by the shorter third and fourth lines.
There was a young fellow from Crete
Who was exceedingly neat
When he got out of bed
He stood on his head
To make sure of not soiling his feet