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Definition of Bad egg
1. Noun. (old-fashioned slang) a bad person. 
Language type: Argot, Cant, Jargon, Lingo, Patois, Slang, Vernacular
Generic synonyms: Bad Person
Antonyms: Good Egg
Generic synonyms: Bad Person
Antonyms: Good Egg
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1. Noun. (old-fashioned slang) a bad person.