B2idiomnatureIELTS-friendly
a fly on the wall
USUK
someone who watches what happens without being noticed
Often 'I'd love to be a fly on the wall'. As an adjective with hyphens it describes documentaries: 'fly-on-the-wall'.
In context
I'd love to be a fly on the wall when they tell the boss about the mistake.
The documentary takes a fly-on-the-wall look at life in a busy hospital.
More idioms about nature
- a big fish in a small pondan important person, but only in a small group or place
- a bird's-eye viewa view of something from high above
- a breath of fresh airsomeone or something new and different that makes a situation more pleasant
- a dark horsea person with hidden talents, or a competitor nobody expected to do well
- a drop in the oceana very small amount compared with what is needed