Dub /dʌb/noun 1forms 1phrases 3 noun1 •(Ireland, informal) A Dubliner.There is a distinction between Dubliners on the one hand and "rednecks" on the other. […] The Dubs historically went to Liverpool and Birmingham, so they don't have the connections. — 1993 formsDubs Phrases with Dub dub outTo fill holes or undulations in an uneven wall with plaster, in order to make it flatter. dub overTo replace the onset voice of an actor with the voice of another actor. dub upTo put someone in prison, or into their individual cell.