Meaning
A person whose dishonest or disruptive behaviour marks, or spreads to, the wider group - originally the single rotten fruit that ruins the whole store. The full proverb warns that one corrupt member spoils the entire group (one bad apple spoils the whole barrel), but the modern short form is often deployed to minimize wrongdoing as isolated: just a few bad apples. Pairs naturally with this site's a bad egg - bad egg means a bad person without the corrupt-the-group emphasis. Caution: the shortened form often reverses the proverb's logic - the original warns that the whole group gets spoiled; it does not excuse the group. Regional use: English worldwide; strongest currency in American English.
Origin
Genuinely medieval. In the Cook's Tale of the Canterbury Tales, Chaucer has a master dismiss his apprentice with a saying the poet himself flags as inherited - 'Of a proverb, that saith this same word: / Better is rotten apple out of hoard, / Than that it should rot all the remenant' - verified verbatim in the Project Gutenberg text. Franklin's Poor Richard's Almanack has 'The rotten Apple spoils his Companion.' The standalone noun is modern: Wiktionary's earliest citation is Time of 19 March 1956, verified on the entry. The 1970 Osmonds hit One Bad Apple flipped the proverb into the negative, a reversal Merriam-Webster links to today's minimizing few-bad-apples usage in American political commentary.
Research Sources
References used to check this entry’s meaning, history, or documented forms.
Variants
- a few bad apples
- one bad apple spoils the whole barrel
- rotten apple
Usage Examples
- The inquiry found one bad apple in the claims office, but the checks had failed everyone.
- Every recruiting class has a bad apple or two; the question is how fast the coach spots them.
- It was not one bad apple - the whole barrel had gone, said the departing auditor.