Meaning of “blow hot and cold” in the English Dictionary

british dictionary

"blow hot and cold" in British English

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blow hot and cold

to sometimes like or be interested in something or someone and sometimes not, so people are confused about how you really feel:

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

(Definition of “blow hot and cold” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)