Costco shoppers who park their cart next to the free sample stand, waiting for the next batch to be ready. Usually parking in such a way that blocks easy access to other carts, discouraging other sample seekers.
Amy: "Hey, we should go get some free samples."
Matt: "Nah, it's already surrounded by sample squatters."
Amy: "Let's go ram their carts!"
Matt: "Now you're talkin'."