hot air
Longman Dictionary of Contemporary English 5++LDOCE 5++ˌhot ˈair noun [uncountable] things that someone says that are intended to sound impressive but do not really mean anything or are not true 大话，空话 The theory was dismissed as a lot of hot air. 这一理论被认为是空话而没人理会。
Examples from the Corpus
hot air• Today, however, most recommendations are known to be hot air and tail-covering platitudes.• Too much hot air and not enough plan.• You think this stuff about flying is a lot of hot air.ˌhot ˈair nounChineseSyllable
Corpus says someone to that are things that intended
hot air
ˌhot ˈair
noun [uncountable]
things that someone says that are intended to sound impressive but do not really mean anything or are not true:
The theory was dismissed as a lot of hot air.
ˌhot ˈair
noun [uncountable]things that someone says that are intended to sound impressive but do not really mean anything or are not true: