Brown dog barking at the back door
I urgently need a poo.
Person 1"Can you pull in at the next rest stop?"
Person 2"There's a brown dog barking at the back door."
Something wrong or missing? Suggest a fix
While you're here
Toilet. Traditionally an outhouse down the back of the yard, now any toilet at all.
Go for a piss.
Go for a pee.
Go for a pee (said by men).
Go for a poo.
A fart that brought something with it, so a trip to the toilet is urgent.