Slang. An item that is unnamed or unnameable: "It's . . . like a pop-top . . . one of those sharp little boogers you pull off the beer cans" (Hunter S. Thompson).
= buggernoun 1, 3. (1770 —) . Longman Dictionary of Contemporary English You wouldn't want to meet him in a dark alley—he's a mean-looking booger (1995).