bad penny
- idiom
- Informal
- You're like a bad penny, you keep coming back.
- back like a bad penny
Examples
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The 1947 UFO controversy of Roswell, N.M. is like a bad penny: it keeps turning up.
Blog text (21) -
Anyway, he'll turn up, like a bad penny.
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It's time to throw out the bad penny and try something else.
Blog text (13) -
The bad penny that keeps turning up.
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Everybody expects a bad penny to turn up sooner or later.
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Yes, back again, like the proverbial bad penny.
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He keeps turning up like a bad, bad penny.
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You can try to forget her, but she'll come back like a bad penny.
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Every time I think I've left my old habits behind, they reappear like a bad penny.
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He always shows up at the worst times, just like a bad penny.
Synonyms
A person who keeps bothering others
A person who often annoys or causes trouble
A person or thing that keeps causing trouble for someone
Something that keeps causing you trouble or worry
How Often
Surface Forms
Morphology
bad + penny
Although a learner who knows 'bad' and 'penny' can tell it refers to something negative and a coin, those constituents do not signal the key meaning of repeated, unwelcome return. The phrase is proverbially idiomatic ('a bad penny always turns up') and the recurrence/personification sense cannot be predictably derived from the literal words, so a B1 learner would not reliably infer the full meaning.
Etymology
Bad penny comes from a time when a damaged or fake coin was called a bad penny and people tried to avoid it, but the coin still kept turning up in pockets and at shops. So, like that coin, a 'bad penny' today means someone or something 'unwanted' that keeps coming back.