잉글리쉬쇼핑

pound sand

• 
  의미:
  하찮고 무의미한 일을 하다
  
  예시
  The lumber didn't come, so the carpenters pounded sand all afternoon.
  They pounded sand and I helped them out for the last two hours.
  Telling someone to pound sand implies you think they're not very intelligent and can only perform menial tasks.