Limericks are short sometimes bawdy, humorous poems of consisting of fiveAnapaestic lines. Lines 1, 2, and 5 of a Limerick have seven to ten syllables and rhyme with one another. Lines 3 and 4 have five to seven syllables and also rhyme with each other. Edward Lear is famous for his Book of Nonsense which included the poetry form of Limericks.
I'd like to say my mouth is clean
that no ones ever heard me scream
four letter not to be repeated
when there are days I'm quite defeated
and out slip words I didn't mean!