bad egg
C1Informal, dated
Definition
Meaning
A person who is dishonest, untrustworthy, or morally corrupt.
Someone whose behavior causes trouble within a group; a rogue or scoundrel; used metaphorically (from a literal rotten egg).
Linguistics
Semantic Notes
Almost always used as a noun phrase. The 'egg' metaphor suggests something that appears normal on the outside but is spoiled within. More common in early-to-mid 20th century usage; now often considered old-fashioned or humorous.
Dialectal Variation
British vs American Usage
Differences
More historically frequent in British English, though understood in both varieties. In modern AmE, 'bad apple' is a more common equivalent metaphor.
Connotations
In both varieties, carries a tone of mild-to-moderate disapproval, often with a somewhat theatrical or period flavor.
Frequency
Rare in contemporary formal or business contexts. May be used for deliberate stylistic effect (e.g., in historical fiction, to sound quaint).
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] is a bad egg.[Subject] proved (to be) a bad egg.He's been labeled a bad egg.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A bad egg in the basket”
- “Rotten/Bad apple (more modern equivalent)”
Usage
Context Usage
Business
Very rare; would be used only in extremely informal, anecdotal commentary on a person's character, not in professional assessment.
Academic
Virtually never used in academic writing.
Everyday
Used humorously or by older speakers to describe someone who causes problems or can't be trusted.
Technical
Not used.
Examples
By Part of Speech
verb
British English
- N/A – not used as a verb.
American English
- N/A – not used as a verb.
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A – not used as a standalone adjective. The phrase 'bad-egg' can be used attributively (e.g., 'a bad-egg politician').
American English
- N/A – not used as a standalone adjective. Can be used attributively (e.g., 'bad-egg behavior').
Examples
By CEFR Level
- My grandfather always said that man was a bad egg.
- Don't lend him money; he's a bit of a bad egg.
- The company finally fired him after they realized he was a bad egg who had been stealing supplies.
- In the old film, the villain was a classic bad egg in a smart suit.
- The investigation revealed that the seemingly loyal lieutenant was in fact a thoroughgoing bad egg, embezzling funds for years.
- His charming demeanor masked the fact that he was a moral bad egg, exploiting everyone's trust.
Learning
Memory Aids
Mnemonic
Imagine a charming, perfect-looking egg in a carton. When you crack it open, it smells terrible. A 'bad egg' person is similar: outwardly fine, but corrupt inside.
Conceptual Metaphor
PEOPLE ARE FOOD / MORAL CHARACTER IS CONDITION OF FOOD. A person is metaphorically an egg; corruption/spoilage within represents moral failure.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate literally as 'плохое яйцо'. This is not an idiom in Russian. The closest conceptual equivalent is 'гнилой человек' (rotten person) or 'негодяй' (scoundrel).
Common Mistakes
- Using it as an adjective (*'He is very bad egg.'). It is a noun phrase: 'He is a bad egg.'
- Using it to describe a situation or object instead of a person.
- Overusing it in modern, neutral contexts where it sounds unnatural.
Practice
Quiz
Which of the following is the most appropriate modern synonym for 'bad egg' in a business context?
FAQ
Frequently Asked Questions
No, it is considered quite old-fashioned. You will hear it occasionally for humorous or stylistic effect, but 'bad apple' or more direct terms like 'untrustworthy person' are more common in modern speech.
Yes, though historically it was more often applied to men. It can be used for any person. There's no widely used feminine equivalent like 'bad hen'.
The direct and equally dated opposite is 'good egg', meaning a reliable, kind, or excellent person.
It is derogatory but mild and somewhat quaint. It expresses disapproval rather than strong hatred. Its old-fashioned nature often softens the insult.