Blow Hot And Cold Meaning

(intransitive, idiomatic) To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.

Example: 1852 1 July, "New-York University: Commencement Ceremonies—Anniversaries of the Literary Societies," New York Times:
  He blows hot and cold. He will speak for or against.
1968 25 Oct., "A Goat, Twins and a Virgin," Time:
  Geminis, like air, blow hot and cold. They go this way today and another way tomorrow.
2002 12 May, "China says DPP is only welcome if it changes platform ," Taipei Times (retrieved 9 July 2008):
  The Xinhua commentary said that Chen "blows hot and cold, behaves capriciously and is a hard man to trust."