1.Hit it on the nose - To have a perfect understanding of something or to do something perfectly.

Olivia was very smart. She seemed to get everything right at work, constantly hitting things on the nose.

2.Hit me up - To get in contact with someone. For example to email, text, or call an acquaintance.

Hit me up if you'd like to join the team.

3.Hit pay dirt - To come upon something of significant value.

We were so lucky we found that the other day. We certainly hit pay dirt.

4.Hit someone below the belt - To insult or otherwise treat a person in an unfair way.

I can't believe what Brad said to his best friend. That insult was really below the belt, wasn't it?

5.Hit the books - To study intensely. I have three exams coming up next week.

I'm really nervous and have to hit the books soon.

6.Hit the ceiling - To get extremely angry. When they asked how she reacted, I had to say the truth: she hit the ceiling! Yes, she was extremely angry.

7.Hit the hay - To go to bed.

I had a long day and I'm so tired. I think I'll hit the hay soon.

8.Hit the jackpot - To come into possession of wealth or something of great value.

Lisa hoped that maybe one day she would win the jackpot on the lottery,  and use all her winnings  to travel and and luxurious cars.

9Hit the nail on the head - You've figured out the exact truth.

I haven't been able to figure it out, but you have hit the nail on the head!

10.Hit the road - To start on a journey.

Hurry up! It's time to hit the road if we're going to get there in time.

11.Hit the sack - To go to bed and sleep. I've had a very long day. I think I'll hit the sack and see you in the morning.