A feather in one's capMeaning
A symbol of honour and achievement.
A fish out of water
Meaning
Someone in a situation they are unsuited to.
A fool's paradise
Meaning
A state of happiness based on false hope.
A foregone conclusionMeaning
A decision made before the evidence for it is known. An inevitable conclusion.
A good man is hard to find
Meaning
A modern-day proverb, espousing the difficulty of finding a suitable male partner.
A man after my own heart
Meaning
A kindred spirit - someone I can agree with.
A rose is a rose is a rose
Meaning
The meaning most often attributed to this is the notion that when all is said and done, a thing is what it is.
The apple of my eyeMeaning
Originally meaning the central aperture of the eye. Figuratively it is something, or more usually someone, cherished above others.
Barking up the wrong treeMeaning
Making a mistake or a false assumption in something you are trying to achieve.
Put the cart before the horse
Meaning
Reverse the accepted order of things.
Dressed to the nines
Meaning
Dressed flamboyantly or smartly.
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Get over it
Meaning
Don't concern yourself with something that's already in the past; accept it and move on to more productive pursuits.
Get the sack
Meaning
To be dismissed from a job.
My mind's eye
Meaning
One's visual memory or imagination.
In the pink
Meaning
In perfect condition, especially of health.
In the redMeaning
In debt.
Life's too shortMeaning
Response to a request to do something that seems too petty to waste valuable time on.
Man does not live by bread alone
Meaning
Physical nourishment is not sufficient for a healthy life; man also has spiritual needs.
On the bubbleMeaning
On the threshold; finely balanced between success and failure.
Over the moonMeaning
Very happy or delighted.
Rule of thumb
Meaning
A means of estimation made according to a rough and ready practical rule, not based on science or exact measurement.
A safe pair of hands
Meaning
A reliable, if somewhat dull, person who can be entrusted not to make a mistake with a task.
Wish you were here
Meaning
The archetypal message postcard message
You are what you eat
Meaning
The notion that to be fit and healthy you need to eat good food.
from:
http://www.phrases.org.uk/meanings/you%20are%20what%20you%20eat.html