The term 'Forbidden Fruit' is a reference to the biblical story of Adam and Eve, in which they are tempted by a serpent to EAT the fruit from the Tree of Knowledge of Good and Evil, which God had forbidden them to do. The crossword solutions for this term are APPLE (5 letters), TABOO (5 letters), Nono (4 letters), and Eatsofeden (10 letters). APPLE refers to the fruit that was eaten in the Garden of EDEN, TABOO implies something that is not allowed, Nono is a word used to express disapproval, and Eatsofeden is a combination of the words 'EAT' and 'EDEN, ' referring to the Garden of EDEN.