Apparently there's a chain of supermarkets in the US called Piggly Wiggly. Maybe in the South? I'm in the Midwest and have never seen one in real life. I guess you get used to things, but I can't imagine saying, "I'm going to run down to the Piggly Wiggly," with a straight face... 
Oh, yes. Piggly Wiggly is all over here in my city (Charleston, SC). We usually just say "I'm running to the Pig- need anything?" Of course, if you need some harder to find items you go to the "Big Pig" which is the largest store in the chain in my area, because they have more variety. My next door neighbor is the manager of my local Pig!
Some things about the Pig:
They are very into selling locally grown foods, which is a big plus for a lot of people. We have a large farming community so many of us prefer to buy our produce there.
The Newton family, the owners of the chain, also own one of our finest (and nationally renowned) restaurants.
They have recently come out with their own brand of beer called Pig Swig.
I used to know a young woman who was married to a Newton. Sadly, she was widowed a few years later. When she remarried several years later, the Newtons insisted on giving her a $2 million house as a wedding gift. Must be nice!
