The clean-shaven vagina exhibited by strippers and exotic dancers at strip clubs, and lacking the large protruding labia of older, more wornout women. The panini is often enhanced by carefully-groomed pubic-hair "grill-lines" (e.g. the Brazilian). Technically, the clean panini is the antonym of the "roast beef sandwich."
Did you see that stripper's clean panini? She didn't have any lunchmeat hanging out.