Rub-ble-buck-et [ru-bul-buck-it] Noun 1. A vessel in which workers collect waste materials on a construction site; We need a rubblebucket for all this rubble. 2. A wild art-pop band from Brooklyn, NY; I'm jonesing for the new Rubblebucket album ‘Survival Sounds’. 3. The condition of having hard nipples, or riding a mean yes wave; He has great Rubblebucket.