1. Idiom: "You don't understand something."
Meaning: When something is incomprehensible.
Basic English: All Greek to me.
Slang: It's all Greek to me.
Sentence: "Trying to fix the car engine is like Greek to me; I have no clue what I'm doing."
2. Idiom: "An argument."
Meaning: A situation where no one can emerge as a clear winner.
Basic English: A deadlock.
Slang: You can't win a Mexican standoff.
Sentence: "Trying to convince him to change his mind is like a Mexican standoff; it's going nowhere."
3. Idiom: "Share the cost of something."
Meaning: Splitting the expense equally between individuals.
Basic English: Sharing expenses.
Slang: We'll go Dutch.
Sentence: "Instead of one person paying for dinner, let's go Dutch and split the bill."
4. Idiom: "Accept my apology."
Meaning: Requesting forgiveness for an offense.
Basic English: Pardon my French.
Slang: Pardon my French.
Sentence: "I didn't mean to offend you with my comment; pardon my French."
5. Idiom: "To leave work without permission."
Meaning: Leaving work early or without authorization.
Basic English: Leaving without permission.
Slang: Take French leave.
Sentence: "I was feeling unwell, so I decided to take French leave and go home early."
6. Idiom: "Adapt customs."
Meaning: Adjusting one's behavior to fit in with local practices.
Basic English: When in Rome?
Slang: When in Rome?
Sentence: "In Japan, it's customary to take off your shoes indoors, so when in Rome, do as the Romans do."
7. Idiom: "Wow. Quite a drink."
Meaning: Impressed by the size or quality of a beverage.
Basic English: Impressive drink.
Slang: Order. well, when in Rome?
Sentence: "That cocktail is huge! Order one for me too; well, when in Rome, right?"