Always thought 'Brexit' sounded like a laxative breakfast cereal.... so, at the risk of sounding poorile......

If constipation is your problem
And you don't know what to do,
Have some 'brexit' for your breakfast
You will go straight to the loo.

Brexit, brexit, that will fix it,
Bran and prunes and rhubarb too.
Have some brexit for your breakfast:
You will do a great big poo.

I gave brexit to a hippo
Who had constipation too.
He gobbled up a tub of brexit.
Now there's loads of hippo poo.

Brexit, brexit, that will fix it, (etc...)