You will see a type of Ha-Ha in most zoos mainly in front of animals such as elephants. This deep ditch allows you to look at the animals without having all those thick bars in the way.
All well and fine with the definition of a ha-ha then.
We Yanks happen to call them tank traps.
Now please be so kind as to indicate where Nelson Muntz enters into the equation?
Re. tank-traps, so what were they called prior to the invention of the tank?
Moats.
Thank you for spoiling my fun. I had until now a lifelong project to go to Woolwich and take a photograph of a street sign in Ha-ha road.
If I’ve saved you from a trip to Woolwich, I have not lived in vain.
[sub](Although the fruit and veg market’s not bad, to be honest.)[/sub]