Clam up
Clam up verb - To stop talking.
Usage example: the little girl clammed up when the doctor came into the room
Dummy up
Dummy up verb - To stop talking.
Usage example: all of a sudden the suspect just dummied up and demanded the presence of an attorney
Mutual synonyms
Cite this Source
Dummy up and Clam up. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/clam_up/dummy_up
Clam up & Dummy up. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/clam_up/dummy_up>.
Dummy up or Clam up. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/clam_up/dummy_up.
Google Ngram Viewer shows how "clam up" and "dummy up" have occurred on timeline