Costco tourist
A person who goes to Costco for the purpose of only eating the samples and getting in other people's way with abolutely no intention of buying anything in the store. Person may or may not be pushing an empty cart to further disrupt the flow of traffic through the store.
On Martha's 80th birthday, she decided she would do what she does every other day and be a Costco tourist, as she enjoys nothing more than making her daily pilgrimage to Costco. Today she decided she would only make 30 trips around the store, as she scarfs down each free sample offering on each pass while pushing her empty cart to keep others away and obstruct the flow of traffic down the main aisles.