Button your lip

Definitions

To stop talking or remain silent.

To refrain from speaking, often used as a command to be quiet.

Examples

You had better button your lip if you want to keep your job at this company.

I told him to button your lip before he accidentally revealed the surprise party plans.

Synonyms

Zip your lip Hold your tongue Keep it quiet Pipe down Keep mum

Antonyms

Speak your mind Spill the beans Let the cat out Speak up Open up