apple

apple of discord a subject of dissension.

☞ This expression refers to the Greek myth in which a golden apple inscribed 'for the fairest' was contended for by the goddesses Hera, Athene, and Aphrodite.

the apple of your eye a person or thing of whom you are extremely fond and proud.

☞ In Old English, the phrase referred to the pupil of the eye, considered to be a globular solid body; it came to be used as a symbol of something cherished and watched over.

apples and oranges (of two people or things) irreconcilably or fundamentally different. North American

a rotten (or bad) apple a bad person in a group, typically one whose behaviour is likely to have a corrupting influence on the rest. informal

she's apples used to indicate that everything is in good order and there is nothing to worry about. Australian informal

☞ Apples and spice or apples and rice is Australian rhyming slang for nice.