You can hit the sack.
關于俚語“hit the sack” 的故事:
美國大兵把他們的睡袋稱作sacks,去睡覺就成了去麻袋里。因此,hit the sack由此而流傳出來。
ring a bell 想起,忽然有了模糊的記憶
常常指想起某件很熟悉的事情,以下是個例句:
A:Do you know the girl who was talking with Dan?
B: I can't remember her name but her face rings a bell with me.