1. to be favorable at one moment and adverse the next; to have mixed or inconsistent feelings about something

1. He's been blowing hot and cold about the trip to Brazil.

2. He keeps blowing hot and cold on the question of moving to the country.

3. He blows hot and cold about this. I wish he’d make up his mind.

4. I don’t understand Jack. One day he’s really nice to me, and the next day he couldn’t care less. He blows hot and cold.

5. Pam blows hot and cold about studying nursing. Sometimes she says she would enjoy it and sometimes she says it would be too much work.