keep it on the butthole

To keep secret or private; possessing information or material that is confidential, only to an individual or select few, and must remain that way.

Popularized in late 2020 Western New York during the COVID-19 pandemic.

I don’t think we should tell Anthony about this. He has never been able to keep it on the butthole with anything. If I know that guy, he will tell everyone and their mother.