A fork of Rural Dictionary
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.
A phrase some people (myself included) use when they shoot a teammate by accident in COD
*Shoots teammate* "what the F##k," " Sorry, fly on the wall"