Meaning : Go to sleep

Sentence : I've got to get up early tomorrow, so I'm going to hit the sack.

Meaning : Stop working on something

Sentence : I'm getting a bit tired now - let's call it a day.

Meaning : To get something over with because it is inevitable

Sentence : When the time comes, I’ll bite the bullet and take my punishment without a fuss.

Meaning : Avoid saying what you mean, usually because it is uncomfortable.

Sentence : If you want to ask me, just ask; don’t beat around the bush.”

Meaning : Something common

Sentence : For savvy shoppers, deals are a dime a dozen