What is another word for not saying boo?
Pronunciation: [nˌɒt sˈe͡ɪɪŋ bˈuː] (IPA) 
The phrase "not saying boo" is often used to refer to someone who is extremely quiet or not speaking up at all. There are several other synonyms that can be used in place of this phrase, including "keeping mum," "mum's the word," "silent as a mouse," and "tight-lipped." Each of these phrases represents a different aspect of being quiet or not speaking, such as avoiding gossip or holding back information. Depending on the context of the situation, a different synonym may be more appropriate to use. Regardless of which phrase is chosen, they all convey the same idea of someone being hesitant to speak or remaining silent.
