country mouse 

A country bumpkin who visits a big city.

Look at that country mouse over there, looks like he's never seen a skyscraper before.

country mouse by Ollie the Dog December 29, 2003

poorer than a country mouse 

need to say no more

Someone approaches you in the street for a donation of some sort...
response: sorry I am poorer than a country mouse. it get the message across.

poorer than a country mouse by The Original Country Mouse March 23, 2011