hot air

nouns

air that has been heated and tends to rise
hot air
is a type of (narrower)
a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of
"air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
air
loud and confused and empty talk
"mere rhetoric"
empty talk, empty words, hot air, palaver, rhetoric