rumbullion noun4 •(dialect, no longer used) A great tumult. •(no longer used) Synonym of rum, an alcoholic beverage distilled from sugarcane, similar spirits....the chiefe fudling they make in the Island is Rumbullion, alias Kill-Devill, and this is made of suggar canes distilled, a hott, hellish and terrible liquor. — 1651 •(no longer used) A kind of peach. •(no longer used) A kind of gooseberry. formsrumbullions