The northern Luzon giant cloud rat or northern Luzon slender-tailed cloud rat, also known as bu-ot in Filipino, is a large species of rodent in the family Muridae. It is only found in Luzon, the Philippines.

The Muridae, or murids, are either the largest or second-largest family of rodents and of mammals, containing approximately 870 species, including many species of mice, rats, and gerbils found naturally throughout Eurasia, Africa, and Australia.