honest to God
US /ˈɑːnɪst tə ɡɑːd/
UK /ˈɑːnɪst tə ɡɑːd/

1.
honestamente, de verdad
used to emphasize that what one is saying is true, or to express surprise or exasperation
:
•
I swear, honest to God, I didn't touch it!
Lo juro, honestamente, ¡no lo toqué!
•
Honest to God, I can't believe he said that!
Honestamente, ¡no puedo creer que haya dicho eso!