be miles away
US /biː maɪlz əˈweɪ/
UK /biː maɪlz əˈweɪ/

1.
estar com a cabeça nas nuvens, estar distraído
to be thinking about something else and not paying attention to what is happening around you
:
•
I tried talking to him, but he was miles away.
Tentei falar com ele, mas ele estava com a cabeça nas nuvens.
•
She must have been miles away, because she didn't hear a word I said.
Ela devia estar com a cabeça nas nuvens, porque não ouviu uma palavra do que eu disse.