# cop oneself on

idiom

Source: https://englishreference.com/idiom/cop-oneself-on
Updated: 2026-08-10

## Meaning

to cop on, stop behaving immaturely

## Examples

- You need to cop yourself on and stop acting like a child.
- If you want to keep your job, you really need to cop yourself on and start taking your responsibilities seriously.
- After years of reckless behavior, he finally realized it was time to cop himself on and begin building a stable future for his family.

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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.