Examples of limericks:

Thin Vin

I know a young fellow named Vin 

Who is really remarkably thin. 

When he carries a pole 

People say, “Bless my soul! 

What a shock to find out you’ve a twin.”

The Man from Peru

There once was a man from Peru 

Who dreamt that he swallowed his shoe. 

He woke up in fright 

In the mid of the night 

To learn that his dream had come true!