tush      
 exclamation  old use uk/tʌʃ/ us/tʌʃ/
 呸,啐(表示某事愚蠢或不真实)
used to say that something is stupid or not true
 tush       
noun [ C ] US informal uk/tʊʃ/ us/tʊʃ/
 屁股
the part of your body that you sit on; bottom
  I slipped on the ice and landed right on my tush! 我在冰上滑了一跤,一屁股坐在了地上! 
 Synonyms: backside (BODY) behind bum (BODY PART) butt (BOTTOM) rear rump stern (PART OF BODY) tail (BOTTOM)