clam up

Speech parts

1. clam up - Verb

2. clam up - Phrase

refuse to talk or stop talking; fall silent

Source: WordNet

shut up close up be quiet button up dummy up keep mum belt up hush shush quiet pipe down dry up keep quiet quieten stop talking

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talk jabber ramble state say babble

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The children shut up when their father approached Source: Internet

But the salesman will clam up and let you figure out the “don’t buy” reasons. Source: Internet

She made John Lennon blush and Marlon Brando clam up. Source: Internet

Whereas, up on the diving board there is the certainty of the outcome and I clam up. Source: Internet

clam up