In colloquial Bulgarian. Otherwise, the official word for “circumcised” is indeed “obryazan”. “Ryazan” is simply “cut” (f.e. cut salami), but it’s also a slang for a circumcised Muslim (usually not applied for other circumcised people, only Muslims, maybe sometimes Jews). Of course, another option (again in Bulgarian slang) is to go full noun – rezanyak (again with the same negative implication, i.e. religious circumcision).