greaseball noun5 •(slang, offensive) A person of Italian descent. •(slang, offensive) Any person of Mediterranean (Italian, Spanish, Portuguese, Greek) or Hispanic (Latin American) descent. •(slang) A biker, a tough. •(slang) A rocker or metalhead, especially one who listens to 1950s rock and roll or 1980s thrash metal. •(slang) A mechanic. formsgreaseballs