Nonsense verse is a form of light, often rhythmical verse, often for children, depicting peculiar characters in amusing and fantastical situations. It is whimsical and humorous in tone and tends to employ fanciful phrases and meaningless made-up words. Nonsense verse is closely related to Amphigouri (Greek amphi- (q.v.) + gyros "circle," thus "circle on both sides," or from Gk. -agoria "speech"), which is a meaningless or nonsensical piece of writing, especially one intended as a parody.
Limericks are probably the best known form of nonsense verse, although they tend nowadays to be used for bawdy or straightforwardly humorous, rather than nonsensical, effect.