Hit the hay

Go to bed or go to sleep.

In 1902, mattresses were often sacks stuffed with straw or hay (hence the similar phrase 'hit the sack ').

The phrase 'hit the hay' seems to have originated in the US sports scene. The Oakland Tribune, July 1903, reported this: "'Sam' Berger, the Olympic heavyweight ... was sleepy and he announced that 'he was going to hit the hay.'"

 Ex: “I’m so tired! I’m going to hit the hay”

Spanish: me voy al sobre

German: sich hinhauen