backside [ˈbækˌsaɪd]

例句:

• He gave the donkey a mighty prod in the backside.
  他用力捅了一下驴屁股。
  来自柯林斯例句
• What he needs is a good boot up the backside!
  他需要的是在他屁股上狠狠踢一脚。
  来自《权威词典》
• Get up off your backside and do some work!
  起来干点活儿吧！
  
• The bench on the backside of the bed headboard?
  来自BBC
• They boost your career and they cover your backside.
  来自THETIMES
• The engine just dropped out of his backside.
  来自THETIMES