An insult used to describe incompetent people who take the scooters at Walmart cause they're too lazy to walk. This term is typically used in a normal setting to call someone overweight or very lazy. (or both)
Person A: That Sky chick is a Walmartrider Person B: I know, I wish she would actually be more helpful
A run at a steady gentle pace around Walmart (or another large store) before buying/looking at items in the store, typically done in a herd of more than 5.
Group of friends: *Starts trying on clothes and wandering around Walmart*
Jack: “Hey assholes, we didn’t do our Walmart Lap yet, put that shit down and start running!”