"Kalibuga" (Kolibugan) means "mixed breed" and refers to the Subanun of the Philippines who have intermarried with the Tausug and Samal. Kalibugan, who number about 15,000, live in villages on the coast in western Mindanao. Most have converted to Islam. Their culture shares elements with those of Subanun, Tausug, and Samal.
See also Subanun
Gowing, Peter G. (1975). "The Growing List of Filippino Muslim Groups." Danalan Research Center Reports 1:5-6.