Why is a limerick called a limerick?

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Tags

1. #reference
2. #verse
3. #included
4. #county
5. #taken
6. #derive
7. #refrain
8. #ireland
9. #sometimes
10. #poets
11. #particularly
12. #earlier
13. #parlour
14. #generally
15. #maigue
16. #limerick
17. #traditionally
18. #nonsense