tigbuabu noun English. A bird, probably the moluccan graybird, Scientific name. Coracina morio. Example sentence: Subanen. Kiin tigbuabu, kaas iini piningalan nami dun, mialap na laak di palasen, pu' mabu. English. As for the graybird, the reason we call it that is taken from its color, because it is gray. Generic. manukmanuk