A fixed light-verse form of five generally anapestic lines rhyming AABBA. Edward Lear, who popularized the form, fused the third and fourth lines into a single line with internal rhyme. Limericks are traditionally bawdy or just irreverent.
“There was an Old Man with a Beard”
BY EDWARD LEAR
There was an Old Man with a beard,
Who said, "It is just as I feared!—
Two Owls and a Hen, four Larks and a Wren,
Have all built their nests in my beard.
“A Young Lady of Lynn”
There was a young lady of Lynn,
Who was so uncommonly thin
That when she essayed
To drink lemonade
She slipped through the straw and fell in.