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1. Indifferent; unemotional. I know you've said that Olivia is very warm and friendly, but I've only ever known her to be ice-cold. If Michael's being ice-cold to you, it's probably because he's mad about your impending move.
2. Especially cruel or remorseless. They fired him right in front of his wife and children? Wow, that's ice-cold. He's an ice-cold killer. He murdered seven people and didn't even blink.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.