not say boo

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

not say boo idiom
1. US informal to say nothing
• You didn't say boo to me about going to your mother's this weekend.
Thesaurus⁺: ↑Not saying much ↑Blunt and direct in speech and behaviour ↑Not being friendly ↑Digressing and being indirect or evasive
2. US ( UK not say boo to a goose ) to be very nervous and easily frightened
Thesaurus⁺: ↑Shy and modest ↑Anxious and worried
Main entry: say_idiom