tush
From Longman Dictionary of Contemporary Englishtushtush /tʊʃ/ noun [countable] American English informal the part of your body that you sit onExamples from the Corpustush• Photo two is an example of a horse which has unusually high tushes.• The tushes that mares have are usually much smaller.• Then that big white tush was ambling towards me.Origin tush (1900-2000) Yiddish toches