U Wasawa (Burmese: ဦးဝါသဝ, also spelled U Warthawa), also known as 550 Sayadaw (Burmese: ၅၅၀ ဆရာတော်), is a Burmese ultranationalist monk and pro-military supporter who leads a Pyusawhti militia in Kanbalu. Local media have referred to him as a "Buddhist terrorist".[1][2][3]