fat is in the fire
Something has happened that will cause trouble or make a bad situation worse.
He found out you took it? Well, the fat's in the fire now.
faultfinding
Recrimination; nagging; criticism.
All of this constant faultfinding will only to lead to trouble between you and your wife.
fear and trembling
fear and trepidation
in fear and trembling
Great fear.
He came in fear and trembling to tell his father he had a bad report card.
feast or a famine
either a feast or a famine
Plenty or very little; big success or bad failure.
In this business it's either a feast or a famine.
He is very careless with his money, it is always a feast or a famine with him.
feather in one's cap
Something to be proud of; an honor.
Что-то чем можно гордиться, почёт.
It was a feather in his cap to win first prize.
That harward degree is a feather in her cap.
Диплом из Гарварда это что-то чем она может по-настоящему гордиться.
From the medieval practice of placing a feather in the helmet of one who won honors in battle.
It’s a real feather in his cap to represent his country in the Olympics.
John earned a feather in his cap by getting an A in physics.
feel in one's bones
know in one's bones
To have an idea or feeling but not know why.
I feel in my bones that tomorrow will be a sunny day.
I know in my bones that God will protect us.
feel no pain
To be drunk.
After a few drinks, the man felt no pain and began to act foolishly.
feel the pinch
To be short of money; experience monetary difficulties.
If we are going to have a recession, everybody will feel the pinch.