What is another word for dummies up?
Pronunciation: [dˈʌmɪz ˈʌp] (IPA) 
"Dummies up" is an informal term meaning to remain silent or quiet, often to avoid disclosing information or to evade a question. Some synonyms for this term include "clams up," "keeps mum," "zip one's lips," "shuts up," "button one's lip," "holds one's tongue," and "stops talking." These phrases suggest the idea of closing or sealing the mouth to prevent words from escaping. Other related expressions include "plays dumb," "acts ignorant," and "feigns ignorance," all implying that the person is deliberately pretending not to know or understand something. Overall, these synonyms reflect the idea of maintaining silence or withholding information.
