fly on the wall

Idioms  

1. An unseen observer or listener, as in I wish I could be a fly on the wall when she tells him she's pregnant. [Mid-1900s]

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Example Sentences

"I've always wanted to be a fly on the wall and see what he's saying about our lads," said Tuipulotu.

From Barron's • Feb. 20, 2026

“I’m kind of excited to be a fly on the wall in a room with Spielberg and Scorsese and all these people,” he said ahead of the Golden Globes.

From Los Angeles Times • Jan. 13, 2026

At 6′7″ tall, Smith knows he's rarely a fly on the wall when he arrives in a community with a camera.

From Scientific American • Oct. 17, 2023

I wanted it to be a fun ride and have people rooting for this family but also feeling they are with us as either a fly on the wall or part of this family.

From Salon • Sep. 29, 2023

He tries to be a fly on the wall, and lets us talk among ourselves, giving advice and guiding us only when he needs to.

From "Challenger Deep" by Neal Shusterman