keep/stay mum

phrase

informal

: to not tell anyone (about something)

She told him to keep/stay mum about the project.

Examples of keep/stay mum in a Sentence

Recent Examples on the Web

Here's what one House committee member had to say about Maxwell's decision to stay mum. — Kathryn Palmer, USA Today, 9 Feb. 2026

But too many major institutions have chosen to cut their own deals or just stay mum. — Ronald Brownstein, Mercury News, 2 Oct. 2025

Huda is sailing at full speed with her new relationship with Louis Russell, but one big streaming company forced her to keep mum about it. — Lea Veloso, StyleCaster, 26 Aug. 2025

Also honored were Highway Commissioner Gary DePue and Clerk Loretta Wells, who tended to stay mum during clashes between Henyard and trustees. — Olivia Stevens, Chicago Tribune, 14 May 2025