Cebuano
n. throbbing, low, booming sound. Kutubkutub sa lansa, The put-put of the launch; v. 1. make a low throbbing or booming sound from a distance; 2. mumble words incoherently. Sugúun gánì nà siya, mukutubkutub dáyun ang bàbà, When you ask her to do something, she immediately starts mumbling under her breath. Dì makláru ang pangadyì kay nagkutubkutub lang ang bàbà, You can’t understand the prayers because they are just mumbled.