hot air
US /hɑt ɛr/
UK /hɑt ɛr/

1.
blá-blá-blá, conversa fiada
empty, exaggerated, or boastful talk
:
•
His promises were just a lot of hot air.
As promessas dele eram apenas muito blá-blá-blá.
•
Don't listen to his hot air; he never follows through.
Não dê ouvidos ao blá-blá-blá dele; ele nunca cumpre.