Feel Free :
Feel At Home :
If you feel relaxed and comfortable somewhere or with someone, you feel at home.
Feel Free :
If you ask for permission to do something and are told to feel free, the other person means that there is absolutely no problem.
Feel Like A Millionaire :
If you feel like a millionaire, you are feeling very well (health) and happy
Feel The Pinch :
If someone is short of money or feeling restricted in some other way, they are feeling the pinch.
Feeling Blue :
If you feel blue, you are feeling unwell, mainly associated with depression or unhappiness.
Feet of Clay :
If someone has feet of clay, they have flaws that make them seem more human and like normal people.
Feet on The Ground :
A practical and realistic person has their feet on the ground.
Fence Sitter :
Someone that tries to support both side of an argument without committing to either is a fence sitter.
Few and Far Between :
Fiddle While Rome Burns. :
If people are fiddling while Rome burns, they are wasting their time on futile things while problems threaten to destroy them.
Fifth Columnist :
A fifth columnist is a member of a subversive organization who tries to help an enemy invade.
Fifth Wheel :
A fifth wheel is something unnecessary or useless.
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