a pony - A pony is 25 pounds. Like, in London, people think that's a

A pony is 25 pounds. Like, in London, people think that's a lot of money and it's basically just a fancy way of saying 'I'm broke.'

I only have 25 pounds, which is like a pony

My little pony is 25 pounds and I can't afford it

I'm broke because I only have one pony