To go to bed
Hey kids, it’s already late, you have to go to school early morning. It’s time to hit the hay.
3 hit the hay informal to go to bed
hit the hay
hit the ˈhay/ˈsack idiom
(informal) to go to bed
Cambridge Advanced Learner's Dictionary - 4th Edition
hit the hay/sack informal
to go to bed in order to sleep:
I've got a busy day tomorrow, so I think I'll hit the sack.
© Cambridge University Press 2013
hit the hay or hit the sack informal : to go to bed
• I'm tired. I'm going to hit the hay.