from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Simple past tense and past participle of clam up.
Sorry, no etymologies found.
The minute I mentioned his name — and the Hunters Moon Clan — all three of them clammed up and wouldn't say a word, even for the promise of a twenty-dollar bill.
The minute Luke conï¬ded in me, even though he was drunk, he clammed up about it, laughed it off, like he was joking, but I don’t think so.”
Aunt Lette and Uncle Sam always clammed up whenever I asked about him.