flaɪ ɔn ðə wɔl
Animals
neutral
intermediate
- Literally:
- An insect resting on a wall
What does "fly on the wall" mean?
- An unnoticed observer of a situation
- Someone who secretly witnesses events
Examples
- I'd love to be a fly on the wall in that meeting.
- The documentary took a fly-on-the-wall approach.
- Imagine being a fly on the wall when they had that argument.
Origin
20th-century expression capturing the idea of being invisible while observing. A fly on the wall would see and hear everything without being noticed.
How to use it
Often used with 'I'd love to be' to express curiosity. 'Fly-on-the-wall' describes documentary styles showing unscripted reality.
Similar expressions
invisible observer
secret witness
Opposites
center of attention
participant
Related idioms
- kill two birds with one stone
To accomplish two goals with a single action
- let the cat out of the bag
To reveal a secret accidentally
- elephant in the room
An obvious problem or issue that everyone is aware of but no one wants to discuss
- don't count your chickens before they hatch
Don't assume success before it actually happens
- hold your horses
To wait and be patient
- fish out of water
Someone who feels awkward or uncomfortable in a particular situation
Use it in a practice answer
Try "fly on the wall" in a CELPIP-style Speaking or Writing task. The AI feedback tells you whether your word choice worked.