sibukuk noun English. Cougal bird, gen. for the genus Scientific name. Centropus. Note. Name is onomatopoeic of bird's call, perceived as sikukuk. Example sentence: Subanen. Ki sibukuk, sa' mektalu' sa' gebii, ndi' mpia, pu' duun dawi mbalu. English. It's bad when the cougal calls at night, because it is said that s.o. will be widowed. sibukuk letin noun English. A bird, probably the common cougal, Scientific name. Centropus sinensis. sibukuk ulangan noun English. A bird, probably the black-faced cougal, Scientific name. Centropus melanops. Generic. manukmanuk