Oh, that's easy. A Krogerite is a customer who loves shopping at Kroger (most, if not all the time) and is the type of person who, if you mention other chains like Walmart, Aldi's, Save-a-lot, etc, they sniff "I would never shop at those other places" with a snobbish attitude.
What they don't realize is that there are just as many "low brow" skuzzies who shop here at Kroger as there are who shop @ Walmart.