A bad egg
Idioms & PhrasesMEDIUM
dishonest or ill-behaved person
A bad egg
Idioms & PhrasesMEDIUM
dishonest or ill-behaved person
Learning Progress
Examples
"He comes of a noble family but he himself is a bad egg."
"We discovered that the contractor was a bad egg after he took the deposit and disappeared."
Mnemonic Trick
Think of an egg gone rotten inside a basket of good ones — one bad person spoils trust.
Cultural Context
Informal; used to warn about an untrustworthy individual.
Source: Idioms & PhrasesAdded: 11/13/2025
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