ɑːs ɑɹs ˈbækˌsaɪd bɪˈhaɪnd ˈbɒtəm ˈbɑtəm bʌnz ˈbʌtəks ˈkæn ˈneɪtiːz pɒˈstɪə.ɹi.ə poʊˈstɪɹ.i.ɚ ˈɹʌmp siːt tʊʃ the part of an animal that corresponds to the human buttocks the fleshy part of the human body that you sit on he deserves a good kick in the butt are you going to sit on your fanny and do nothing?