Meaning of the word "not say boo to a goose" in English

What does "not say boo to a goose" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

not say boo to a goose

US /nɑt seɪ buː tu ə ɡuːs/
UK /nɑt seɪ buː tu ə ɡuːs/
"not say boo to a goose" picture

Idiom

1.

to be very shy and quiet, and unable to speak to people you do not know

Example:
She's so timid, she wouldn't say boo to a goose.
Despite his tough appearance, he wouldn't say boo to a goose in real life.
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