rumbustion means synonym of rum, an alcoholic beverage distilled from sugarcane, similar spirits.
Etymology
Uncertain. The forms rhum and rumbullion appear around the same time.
noun
- Synonym of rum, an alcoholic beverage distilled from sugarcane, similar spirits.“... Partly the Brandewin wherewith we have furnisht him, the spirits of Rombostion, which our men there make him, and other good hopes we give him, he becomes very valiant ...”