Blow hot and cold = react in different , unpredictable ways , so people are confused about how you really feel.
- He has been blowing hot and cold about the trip to Brazil.
- He keeps blowing hot and cold on the question of moving to the country.
- He blows hot and cold about this. I wish he would make up his mind.
Get wind of something = hear about something secret.
- I don’t want my colleagues to get wind of the fact that I’m leaving.
- I don’t want the press to get wind of our plans at this stage.
- He got wind of the invasion in August 1942.
See how/which way the wind is blowing = to see how a situation develops before making up your mind about it ; to know other people’s opinion.
- I think I will see which way the wind is blowing before I vote at the Board meeting.
- Those politicians know which way the wind is blowing among their voters.
- Sam failed to see how the wind was blowing and got himself caught up in an argument.