This is a private deal - we don't have to do everything by the book.
face the music
to accept criticism or punishment for something that you have done
When the missing money was noticed, he chose to disappear rather than face the music.
first things first
used to tell someone that more important things should be done before less important things:
First things first, let's have something to eat.
dos and don'ts
rules about what you must do and what you must not do in a particular situation
In the back of the guide there's a list of the dos and don'ts of local etiquette.
save (sth) for a rainy day
to keep an amount of money for a time in the future when it might be needed
She has a couple of thousand pounds kept aside which she's saving for a rainy day.
break the ice
to make people who have not met before feel more relaxed with each other:
Someone suggested that we play a party game to break the ice.
Let's break the ice by having everyone give their name and say a few words about their job.
call it a day informal
to stop doing something, especially working
After playing together for 20 years, the band has finally decided to call it a day.