# evil twin

idiom

Source: https://englishreference.com/idiom/evil-twin
Updated: 2026-08-10

## Meaning

A duplicate or counterpart that acts in a contrary, nefarious, or insidious manner.

## Examples

- My computer acts like my evil twin when I try to work.
- He was usually kind, but after a long day, his evil twin seemed to take over his personality.
- The politician’s sudden shift toward radical policies made his supporters wonder if his evil twin had replaced him.

## Origin

From evil and twin.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.