Not saying boo and Tight-lipped

Tight-lipped and not saying boo are semantically related. in quiet topic. In some cases you can use "Tight-lipped" instead an adjective phrase "Not saying boo", when it comes to topics like without or with little sound, without ability to talk.

Tight-lipped adjective - Tending not to speak frequently (as by habit or inclination).

Not saying boo and tight-lipped are semantically related. Sometimes you can use "Not saying boo" instead an adjective phrase "Tight-lipped".