fly on the wall 

someone who secretly watches something. like they're a fly on the wall and you don't notice them.

carlos knows that rosita's baby is really chico's thanks to that fly on the wall.

fly on the wall by tom March 2, 2004

fly on the wall 

An unseen or unnoticed presence in a situation.

"Fly on the wall documentary" meaning a documentary where the cameras go unnoticed by the subject of the film.
"I wish I had been a fly on the wall at that meeting" meaning I wish I could have sat in unseen on that meeting.

fly on the wall by djsmythe March 1, 2004

fly on the wall 

the receiver of the screenshots of a conversation. 2016

"Hold up, you're gonna be the fly on the wall."

fly on the wall by Brina1014 September 12, 2016

fly on the wall 

to be present to listen/see what goes on behind closed doors, that is, in a room closed to the media or other non-participants

1. I'd like to be a fly on the wall when that (distrusted) union steward is making deals with management all on his own

2. I'd like to be a fly on the wall when my ex and her lawyer are talking about our separation agreement

3. I'd like to be a fly on the wall of suite 401 of the Best Western when my ex is visiting her boyfriend who's up here on business

fly on the wall by Jake March 1, 2004

fly on the wall 

an inconspicuous observer, a secret witness

I think there was a fly on the wall when I told mom about the Nigerian email that I had to delete.

fly on the wall by The Return of Light Joker January 23, 2008

Fly on the wall 

When a male does a headstand, naked, against a wall and his penis and balls resembles the facial configurations of a fly or mosquito. You can also flail your legs to make it look like your fly has arms. Like a wacky, waving, inflatable, arm-flailing tube man.

My son keeps doing the fly on the wall whenever he gets out of the shower.

Fly on the wall by Swaggasaurus April 20, 2016

fly on the wall 

A fly on the wall is someone who plays the role of victim when a bully is abusing them in any way. This can include isolating oneself, hiding, and getting into a fetal position.

When I was in 8th grade at Gateway Acadrmy in downtown Houston, Texas a guy named Ryan Pierce bullied me everyday, so I hid in janitors closets. I felt like a fly on the wall.

fly on the wall by PWS27 August 16, 2017