clam up

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Related to clam up: clammer, Long clam

clam 1

a. Any of various usually burrowing marine and freshwater bivalve mollusks chiefly of the subclass Heterodonta, including members of the families Veneridae and Myidae, many of which are edible.
b. The soft edible body of such a mollusk.
2. Informal A close-mouthed person, especially one who can keep a secret.
3. Slang A dollar: owed them 75 clams.
intr.v. clammed, clam·ming, clams
To hunt for clams.
Phrasal Verb:
clam up Informal
To refuse to talk.

[From obsolete clam-shell, shell that clamps, clam, from clam.]

clam′mer n.

clam 2

A clamp or vise.

[Middle English, from Old English clam, clamm, bond, fetter.]

clam up

(intr, adverb) informal to keep or become silent or withhold information
ThesaurusAntonymsRelated WordsSynonymsLegend:
Verb1.clam up - refuse to talk or stop talkingclam up - refuse to talk or stop talking; fall silent; "The children shut up when their father approached"

w>clam up

vi (inf)keinen Piep (mehr) sagen (inf); he clammed up on meich habe kein Wort mehr aus ihm herausgekriegt (inf)