1. Home
2. Idioms
3. shut up like a clam

shut up like a clam

---

---

shut up like a clam

to suddenly stop talking and to refuse to say any more

Usage notes: A clam is a fish with a shell which closes up very quickly if something attacks it.

When I asked him about his trip to Korea, he shut up like a clam.

See also: clam, like, shut, up