When one enters a grocery store in the pursuit of making a meal out of all the samples around the store. A strong indicator of a cheap ass.
John got kicked out of Safeway for having a Costco Lunch in the Deli section.
going to the store Costco with no intention of buying anything, except to walk around and eat all the free samples
#1: Dude, the other day I forgot my money at home so I had to eat a Costo Lunch.
#2: The other day I had to sneak around Costco stealing free samples, making sure the people didn't recognize me...what a Costco Lunch!