backsideEnglish → SpanishOxford English–Spanishbackside /AmE ˈbækˌsaɪd , BrE bakˈsʌɪd, ˈbaksʌɪd / noun 1 (buttocks) (informal) trasero m (informal); culo m (informalvulgar slang)2 (reverse) (US) parte f posterior