If two or more people go Dutch, each of them pays their own meal when they eat together.
- We'll go Dutch on dinner.
courage or confidence that a person gains from drinking alcohol
- I'll have a vodka to give me Dutch courage.
Take French leave (British)
to be absent from work without asking permission
- I think he's taking French leave. He is not seriously ill.
Excuse/pardon my French
This phrase is used to apologize for using an impolite word
- Pardon my French, but that’s total bullshit.
It's (all) Greek to me
This phrase is used to describe something that you do not understand at all.
- She tried to explain how to use the system, but it was all Greek to me.
used to refer to unusually warm, dry and calm weather in late autumn
- We 're having an Indian summer, even though it is October.
used to describe a situation in which an agreement cannot be reached because neither side is willing to change its opinion
- The negotiations ended in a Mexican standoff.
a gossip that is told by one person to another, and is changed slightly each time.
- The stories of her resignation are just Chinese whispers.
You can refer to a think drizzly mist as Scotch mist.