A limerick is a short, humorous, and nonsense poem. A limerick has a rhyme scheme of aabba. The first two lines rhyme with the last line and the 3rd and 4th line rhyme, and they are sometimes shorter. Limericks originated in England in the 18th century. Limericks started to become famous when Edward Lear started to use it the 19th century.

A caffenated life

I've reached beyond those limits that bound
And searched around ‘til I finally found
The Pinnacle of Reality
Is in my utter mortality
And so what I've found is simply the ground

By Udiah (witness to Yah)