warm up to someone or something: to begin to like or enjoy something
E.g. He was shy at first but after we talked, he began to warm up to us a little.
The more I learnt about it, the more I warmed up to the idea of adopting a dog.
warm up: to become more friendly/open; to prepare for a performance or competition
E.g. The team had to warm up before the game so they can avoid injuries.
Rich knew how to warm up the audience of The Price is Right. His good looks and charming personality made even that special.
warm body: just anyone who can be counted on
E.g. Our boss asked us to get a couple of warm bodies to stand at the door and hand out fliers.
We cannot afford to have empty seats, so we need to get some warm bodies to fill up the stadium.
warm the bench: to be a secondary or substitute participant; wait one's turn to participate.
E.g. Richard can’t wait until the head of marketing retires; he’s been warming the bench for years .
Axel never has to warm the bench, he plays from the beginning to the end of the game.
like death warmed over: horrible; sick-looking
E.g. I feel like death warmed over. Maybe I should go see a doctor.
Poor thing, you look like death warmed over.
Cold hands, warm heart.: proverb meaning that people whose hands are cold usually have kind and loving personalities; figurative meaning: not showing one’s feeling does not mean not caring
E.g. He doesn't like holding hands with his girlfriend, her hands are so cold. Cold hands, warm heart, I suppose.
Jill’s husband rarely buys her gifts but he is a case of cold hands, warm heart. They are a very happy couple.