wise apple

apple of someone's eye

The object of somebody's affections; a person (or sometimes a thing) that someone strongly prefers; a favorite, a loved one.

apple polisher

A sycophant; a toady.

bad apple

A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.

penny wise and pound foolish

Prudent and thrifty with small amounts of money, but wasteful with large amounts.

rotten apple

A bad person, especially one who has a corrupting influence on others.

the apple does not fall far from the tree

A child grows up to be similar to its parents, both in behavior and in physical characteristics.

word to the wise

A brief piece of advice.