Conversation 1

A: How is your new boss?
B: Not good. We do not always see eye to eye.
A: That’s normal. He is the boss so just go with the flow.
B: You’re right. No need to rock the boat.
A: Yeah. Don’t bite the hand that feeds you.
B: You got that right.

See eye to eye
To think the same way about something.

Go with the flow
To do what other people do.

Rock the boat
To act in a way that threatens stability.

Bite the hand that feeds you
To make people uncomfortable by challenging them.

Conversation 2

A: So, how are things?
B: Terrible. Things are hand to mouth these days.
A: I hear you. I am up to my neck in debt myself.
B: Me too. I really need my tax refund.
A: I know. It will come in really handy when we get it.
B: Well, fingers crossed. I hope it is there today.
A: Yes, fingers crossed.

Hand to mouth
To live paycheck to paycheck

Up to my neck in debt
To have a lot of debt

Come in handy
Be very helpful or useful

Fingers crossed
Done to show you hope something will happen.

Conversation 3

A: Did you hear what Jason said about Mary?
B: Yeah, he has such a big mouth.
A: I know. He is always sticking his nose in other people’s business.
B: Yeah, he better watch his back.
A: Yeah, he better. Mary is out for blood.
B: I would too if he said that about me.
A: I know. You can’t turn a blind eye to that sort of thing.

Have a big mouth
Say things that should be private or unsaid

Stick your nose in other people’s business
To be nosy or to pry into people’s lives

Out for blood
Out for revenge or payback

Watch his back
To be careful of people coming to attack you

Turn a blind eye
To not be upset about something bad done to you, to not seek revenge

Note
In casual conversation you can say ‘he better’ instead of ‘he’d better.’