hit the sack

动词 hit the sack:

1. prepare for sleep
   同义词：go to bed, turn in, bed, crawl in, kip down, hit the hay, sack out, go to sleep, retire

1. Louis was so tired that he hit the sack soon after supper.
   路易斯太累了，所以吃过晚饭早早上床睡觉了。
2. Man, I'm beat. I'm going to hit the sack.
   天啊，我累死了。我要去睡觉了。