Wal-Martian

(n.) 1. A person who attends Wal-Mart frequently
2. Someone who is currently in attendance of Wal-Mart
3. Someone who dresses as if they shop at Wal-Mart

"I'll be the first to admit, I'm a Wal-Martian. I love that store"
"Look at all these Wal-Martians, must be a busy day"