A limerick (/ˈlɪmərɪk/ LIM-ər-ik)[1] is a form of verse that appeared in England in the early years of the 18th century.[2] In combination with a refrain, it forms a limerick song, a traditional humorous drinking song often with obscene verses. It is written in five-line, predominantly anapestic and amphibrach[3] trimeter with a strict rhyme scheme of , in which the first, second and fifth lines rhyme, while the third and fourth ones are shorter and share a different rhyme.[4]

It was popularized by Edward Lear in the 19th century,[5] although he did not use the term. From a folkloric point of view, the form is essentially transgressive; violation of taboo is part of its function. According to Gershon Legman, who compiled the largest and most scholarly anthology, this folk form is always obscene[6] and the exchange of limericks is most commonly observed among comparatively well-educated men.

The following example is a limerick of unknown origin:

A limerick displayed on a plaque in the city of Limerick, Ireland