Zip noun 1forms 1phrases 3 noun1 •(slang, offensive) A Sicilian or Italian Mafioso who is relatively new to the United States.The proprietor was a "Zip" — a Sicilian-born mobster — who was running a gambling operation that cut into Godfather Gotti's turf. — 1988 formsZips Phrases with Zip zip downTo unzip. zip one's lipTo refrain from or to stop talking; to be quiet; shut up. zip upTo close with a zip fastener.