An antiquaited logging and trucking term used to define a large round rock or outcropping of rocks usually on an unpaved road bed that could damage a vehicle.
While at school, you must steal a persons backpack. Take out all their books. Then you must inside out the back pack. Then you put their books back in a zip it back up. The end product resembles a nugget. The rule is if you get nuggeted, you must carry it to your next class like a nugget.