Zone off.
[Slang] ZONE OFF. - Understand Subtle Ways to Express Distraction
Lose focus
Zone off" means to lose focus or daydream in the middle of an activity. It's a casual phrase that describes the action of someone's mind wandering away from the present tasks or discussions.
Example Sentences
I often zone off during long meetings.
I often lose focus during lengthy meetings.
She zoned off in the middle of our conversation.
She lost concentration while we were talking.
Sorry, I zoned off for a moment there. What were you saying?
Apologies, I spaced out for a bit. What were you saying?