The Limerick is a popular 5-line form of light verse. Often ridiculous, it is the poetic equivalent of a cartoon. Limericks are generally about people, usually taking the Mickey! Sometimes absurd, the first line tends to place the subject by place or profession. The rhyme scheme is always aabba. Generally the syllable structure is: 8,8,6,6,8, but an extra syllable may be slipped in here and there.