tubu 1 noun English. A variety of rattan palm whose upper portion's pulp is edible and whose leaves are used to wrap rice to be cooked in bamboo and also used for thatch. Example sentence: Subanen. Sa' mekpelutu' ita baging, putusen deli' dig daun tubu, dekag pasi' isenay dig lebuk. English. When we cook rice in bamboo, it is first wrapped in rattan leaves, before being put into bamboo tubes. Generic. uay