To have (something) both ways

First Example: Mario has been dating Erika for six months, but he also likes Tina and would like to ask her out. Mario wants to have it both ways. He would like to date both Erika and Tina.

Meaning: to have (something or it) both ways means to get the best of a situation by getting the benefits of two opposite things. In this example, Mario likes his relationship with Erika, but he also likes Tina. However, he can't date both of them at the same time because he has been dating Erika for six months. This idiom can apply to any situation where there are two opposite things that can't be done at the same time. It's used as an infinitive in this example.

Here is another example: John works long hours and makes a lot of money, but he would like to have more time off to do the things he enjoys. However, John can't have it both ways. He either works hard and makes a lot of money, or he takes more time off and makes less money.

Meaning: In this case, the two opposite things are working a lot and taking more time off. John can't make a lot of money if he does both of these things at the same time. He must choose one thing. In this example, it's used with the modal "can't."

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To hit the sack (verb)

Meaning - to go to bed in order to sleep

This expression is used when you want to tell someone that you are ready to go to bed in order to fall asleep.

Example 1
I had a long and busy day at work yesterday.  So, I hit the sack as soon as I got home last night.  I am glad I got enough sleep because I feel much better today.

Example 2
John: Hey! You are home.  How was school?
Lisa: It was fun and we practiced a lot of new words.  But now, I am so tired.  I think I am just going to hit the sack.
John: Already?  Aren't you going to study for your test?
Lisa:  I don't think I can.  I am just so sleepy.  I will wake up early and study tomorrow morning.
John: OK, good luck!

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Fender bender

Example 1:
Jack: The freeway was moving really slowly today.
Jill: What was the problem?
Jack: There was an accident.
Jill: Was it bad? Was anyone hurt?
Jack: No. It looked like just a fender bender.

Example 2:
Doreen: Your new car is dented already!
Maureen: I know. I had a fender bender the other day.
Doreen: What a bummer. What happened?
Maureen: It was my fault. I feel so stupid. I was texting when it happened. I’m just glad it wasn’t worse.

Explanation:
Fender bender: a small accident in which only minor damage occurs. The fender of a car is the panel above the tire. In this case bend refers to a dent, which is not as bad as a crack or a break. It is relatively inexpensive to repair the fender of a car compared with the trunk, door or hood.

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To be on point

To be on point: To be exactly right or perfect; extremely good, attractive, or stylish

#1 - Two Friends at a Party
Susan: Did you see Mitzi, yet?
Beth: Yes, I did! She looks so good. Her outfit is on point!
Susan: I know! She always dresses to impress!

#2 - A couple talking after a movie
Brett: That movie was amazing!!
Brittany: Really? I didn't think it was that great. I almost fell asleep.
Brett: What? I thought it was very entertaining. And the lead actress was great.
Brittany: Well, I will agree with you about the actress. Her acting was on point! She will probably be nominated for an Academy Award.
Brett: Yes, I also think the movie was on point and deserves an award!

To be on Point: This idiom can describe a thing, such as a movie, song, etc..., or a person's style and skill; it means to be exactly right or perfect; extremely good, attractive, or stylish. In #1, the two friends are talking about Mitzi's outfit, which is extremely stylish, or on point. In #2, Brittany thinks the actress has excellent acting skills and Brett thinks the movie was amazing, or on point.

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In the dark

Example 1
Toby: Have you heard from Jim? He hasn't returned my calls about the party. I don't know any details yet.
George: Don't worry, that's just how Jim is. He likes to keep people in the dark about things until all the details are finalized.
Toby: Well that's understandable, but I'd at least like to have the time and place so I can make sure I'm free!

Example 2
Tony is leaving the company this month. We were all in the dark about his plans until he announced it this morning. I'm shocked because I had no idea!
_____

Keep someone in the dark about something 
Be in the dark about something

This expression is used when you don't have information about something, but someone else does. In example 1, Jim has the information, but Toby and George do not. Jim keeps them in the dark about the details. In example 2, Tony has the information but didn't share it with his coworkers. His coworkers were in the dark about his departure.

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Dope

Dope (adjective): A word that describes something that is very cool, such as music, movies, clothes, people, etc.

Example 1:

Listen to the song by Outkast "So Fresh, So Clean"

Ain't nobody dope as me, I'm dressed so fresh so clean...Outkast

Example 2:

Kristina: Hey, Brad! Did you go to Trey's party last Saturday night?

Brad: Yes, it was dope! There were tons of people and a live band. 

Kristina: Oh, I'm sorry I missed it. I had to work.

Brad: That sucks. Maybe you can catch Trey's next party at the end of the summer. 

Explanation:

In example 1, the singer is talking about how dope he is because of his nice clothes. In example 2, Brad says that Trey's party was dope, or awesome, because of all the people and live music. This word as a noun is also used to describe drugs, but recently it is used as an adjective to describe a person or thing that is really cool. 

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Fam

Fam - a word used to describe people that you can trust dearly, someone you consider like family, derived from the word "family", referring to people that are extremely close; a new name for one's friends. 

Example 1: Two good friends seeing each other after a long time
Britt: Hey, fam! Long time no see!

Karl: Hey, Britt. Nice to see you! 

Britt: So how's life in San Francisco?

Karl: It's OK, but I miss you and all my friends here in LA.

Example 2: Use in Social Media

"Fam" can also be used to describe a group of people that you feel connected to on social media. For instance, you might use the hashtags #fitfam to refer to other people who live healthy lives or #foodiefam for people who love trying new types of food. 

Hey, I'm trying fried grasshopper for the first time! #foodiefam #streetfood”

It's 5 AM and I'm headed to the gym! #fitfam #gym

Explanation:

In the first example, Britt uses the word "fam" to refer to his really good friend, Karl. Even though they are not actually related by blood, they are so close, they feel like "family." In the second example, "fam" is used to refer to a group of people connected to you with the same interests like "#fitfam" for healthy people and "#foodiefam" for people who like trying different kinds of food.

https://languagesystems.edu/