hot air
空洞的话语或夸大其词的言论
口语·批评空谈或吹嘘
英文释义
meaningless or exaggerated talk; empty promises or boasts
例句
Don't listen to his promises; it's all hot air and nothing will happen.
典故来源
热空气轻飘无实质，比喻空洞无物的大话或虚假承诺。