°Any piece of wood, metal, or other substance used to stop or
fill a
hole; a stopple.
"Pull the plug out of the tub so it can drain."
verb
°To
stop with a plug; to make tight by stopping a hole.
"He attempted to plug the leaks with some caulk."
°To blatantly
mention a particular product or service as if advertising it.
"The main guest on the show just kept plugging his latest movie: it got so tiresome."