fly on the wall
idiomPart ofwall
fly on the wall — idiom
1. a person who is able to watch events without being noticed, or a style of docume
1.idiom
Definition
a person who is able to watch events without being noticed, or a style of documentary that films people behaving naturally without their awareness of the camera.
Example
Yara said she would love to be a fly on the wall during that important meeting.
The documentary used a fly-on-the-wall style to capture life in the hospital.