"hit the sack"

Meaning: to go to bed and sleep

Why does it mean that?

"Sack" is slang for bed.

And "hit" can mean go and do something.

• I need to hit the books.
  (=I need to study.)
  
  
• We will hit the weights after work.
  (=We will lift weights after work.)

When do we use it?

We simply use this when we want or need to go to bed and get some sleep.

How do we use it?

We usually use this idiom as part of a simple sentence. It can replace "go to bed" in any sentence.

• I am tired. I think I need to hit the sack.
• If you are tired, you should hit the sack.
• I need to hit the sack early tonight.

Example English Conversations

A) I am so worn out today.
B) Why is that?
A) I had to stay up late last night to finish some work.
B) You'd better get some good sleep tonight.
A) I know. I am going to hit the sack as soon as I get home.

A) You look like you have a lot of energy today.
B) I hit the sack early last night. So, I feel good today.
A) Getting a good night's sleep is extremely important.

It is important that you know English expressions and idioms if you want to have fluent English conversations with native English speakers or other advanced English speakers. Do not try to learn many expressions and idioms at one time. Instead, study a few of these free English lessons each week and learn English expressions and words well. This will help your English vocabulary improve steadily, and you will start speaking English like a native speaker.