What Has 9 Letters, Starts with "N" Ends With "N" & Means Constipation?

"NNNNNNNNN"

 

Portaloo - I was defeated, you won the war

Portaloo - promise to love you for ever more

Portaloo - couldn't escape if I wanted to..!!!!!

Portaloo - knowing my fate is to be with you

Portaloo - finally facing my Waterloo

Done