Possibly it means eating the core and stem and seeds in the middle of the fruit, and leaving the rest of the apple, the "meat" of the fruit to waste?
No, you cannot eat backwards in checkers.
No, a pawn cannot move backwards in chess.
In Wonderland, you only eat an apple if you know its source.
You've got it backwards.
Not if you are the apple.
You are eating an apple, which is a fruit.
Yes, slugs will eat apple and potato peelings.
In the Bible, it was the serpent who tempted Eve to eat the apple.
SEEDS
apple trees only drink water but don't eat anything
The devil tempted Adam, not Jesus, to eat the apple in Genesis.
Eating the core and the pips of an apple is perfectly safe.