Meaning of the word "say well or be still" in English

What does "say well or be still" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

say well or be still

US /seɪ wɛl ɔːr biː stɪl/
UK /seɪ wɛl ɔː biː stɪl/
"say well or be still" picture

Idiom

a proverb suggesting that one should either speak positively or remain silent

Example:
If you can't find anything nice to mention about his work, remember: say well or be still.
My grandmother always lived by the rule: say well or be still.