bad egg: Idiom Meaning and Origin

What does ‘bad egg’ mean?

The idiom "bad egg" is used to describe a person who is not trustworthy or reliable. It implies that the person is morally corrupt or of low character.

Idiom Explorer

Unveiling the Rotten Core

That bad egg has a deceitful, untrustworthy character.

The phrase "bad egg" is commonly used in English to describe a person who is dishonest, unreliable, or untrustworthy. This idiom has been in use since the 18th century and is thought to have originated from the literal meaning of a bad or spoiled egg, which is unfit for consumption. The earliest recorded usage of "bad egg" as an idiom can be found in a publication called "The Monthly Review" in 1762. In this context, it is stated, "A very good creature, but a bad egg." This suggests that the idiom was already well-known and widely used during that time. The association between a bad egg and a person of questionable character may stem from the idea that a single bad egg can spoil an entire batch. Just like a rotten egg can contaminate other eggs and make them inedible, a person who is considered a bad egg can have a negative influence on those around them. This association is further reinforced by the fact that consuming a spoiled egg can lead to physical discomfort or illness, paralleling the negative consequences of trusting a deceitful person. While the term "bad egg" is primarily used to describe individuals with negative qualities, it is worth noting that it can also be used in a more lighthearted or humorous manner. In certain contexts, it may be used affectionately to describe someone who may have made a mistake or acted mischievously, without necessarily implying malicious intent. Apart from "bad egg," there are several related idioms that carry similar meanings. One such idiom is "bad apple." This phrase is used to describe a person who is considered to be a negative influence on a group or organization. Just as a single bad apple can spoil the rest of the apples in a basket, a person who is a bad apple can have a detrimental effect on the overall harmony and well-being of a group. Similarly, the idiom "rotten egg" is another variant of the concept. A rotten egg is an egg that has reached an advanced stage of spoilage and is therefore inedible. This idiom is used to describe a person who is corrupt, morally bankrupt, or untrustworthy. Like a bad egg, a rotten egg is seen as having a negative impact on those around them. Conversely, the idiom "good egg" is used to describe a person who is honest, reliable, and trustworthy. This term has positive connotations and is the antithesis of a bad egg or a rotten egg. Just as a good egg brings positive qualities and contributes to an environment of trust, a person who is considered a good egg is seen as having a positive influence on others. The idiomatic phrase "bad egg" is used to describe a person who is dishonest, unreliable, or untrustworthy. Its origins can be traced back to the literal meaning of a spoiled egg, which carries negative associations with trust and reliability. While the idiom generally has a negative connotation, it can also be used in a more playful or forgiving manner depending on the context. Additionally, related idioms such as "bad apple," "rotten egg," and "good egg" further explore the themes of negative and positive character traits. These idioms collectively reflect the English language's rich tradition of using colorful phrases to describe human behavior and characteristics.

Example usage

Examples of how the idiom "bad egg" can be used in a sentence:

  • He used to be my friend, but I found out he stole money from me. He turned out to be a bad egg.
  • After several incidents of cheating, the teacher realized that one of the students was a bad egg.
  • She seemed nice at first, but after spreading rumors about everyone, it's clear she's just a bad egg.

More "Disreputable" idioms

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