clam up
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verb
(intr, adverb) informal to keep or become silent or withhold information
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Words nearby clam up
clampdown, clamp down on, clamper, clamshell, clamshell door, clam up, clamworm, clan, Clancy, clandestine, clang
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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How to use clam up in a sentence
Other Idioms and Phrases with clam up
clam up
Refuse to talk or respond, as in Whenever she asks her teenager about his activities, he clams up. This term alludes to the tightly closed valves of a live clam. [Slang; early 1900s]
The American Heritage® Idioms Dictionary
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