haunch         
noun uk/hɔːntʃ/ us/hɑːntʃ/
 [ C ](动物的)腰腿肉 
one of the back legs of an animal with four legs that is used for meat
  a haunch of venison 鹿的腰腿肉 
 haunches[ plural ] (人的)胯部,臀部
the top of a person's legs and their bottom
  She was sitting/squatting on her haunches. 她坐/蹲着。