The phrase identifies a specific type of recreational equipment a trampoline offered at a reduced price by a major retailer, Walmart, during the Black Friday sales event. This represents a convergence of product category, retailer, and promotional period.
The combination offers consumers potential cost savings on an item that promotes physical activity and outdoor play. Historically, Black Friday has been a key date for retailers to offer substantial discounts, and trampolines are often included in these promotions due to their popularity as family gifts and outdoor recreational items.