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    clam up

    US

    ・

    UK

    C2
    phr. v.Phrasal VerbTo suddenly become quiet or refuse to talk
    The witness decided to clam up just as the suspect entered the room

    Video subtitles

    15 PHRASAL VERBS with meanings you can’t guess!

    13:3315 PHRASAL VERBS with meanings you can’t guess!
    • If you clam up, which is a little strange because a clam, like, opens and closes its shell.

      If you clam up, which is a little strange because a clam, like, opens and closes its shell.

    • When it's up, it's open, but when we say to clam up, it means to shut the mouth.

      When it's up, it's open, but when we say to clam up, it means to shut the mouth.

    A2

    Animal Phrasal Verbs! "Clam up", "wolf down", "monkey around"...

    10:31Animal Phrasal Verbs! "Clam up", "wolf down", "monkey around"...
    • "Clam up." So, a clam is a...

      "Clam up." So, a clam is a...

    • Clam up.

      Clam up.

    B1

    What's Inside A Clam?

    04:31What's Inside A Clam?
    • and when clams sense a threat or find themselves out of water, they contract, causing the clam to, you know, clam up.

      and when clams sense a threat or find themselves out of water, they contract, causing the clam to, you know, clam up.

    • And when clams sense a threat or find themselves out of water, they contract, causing the clam to, you know, clam up.

      And when clams sense a threat or find themselves out of water, they contract, causing the clam to, you know, clam up.

    C1

    J.J. Abrams Answers "Star Wars" Fan Theory Questions

    02:39J.J. Abrams Answers "Star Wars" Fan Theory Questions
    • You're going to clam up as soon as I ask any of these questions.

      You're going to clam up as soon as I ask any of these questions.

    A2

    RSA Shorts - Does Brainstorming Work?

    02:21RSA Shorts - Does Brainstorming Work?
    • And if we're worried about being criticized, it'll just clam up and it won't be able to free associate at all.

      And if we're worried about being criticized, it'll just clam up and it won't be able to free associate at all.

    B1