Used in fighting games such as "Super Smash Brothers" or "Soul Calibur" where there is a boundary. Edge Fucking defines an action when a person would smack an opponent out of bounds with an attack. People that masters the skills to Edge Fucking are usually considered more 1337 than someone that relies on Edge Guarding.
"Wow, Kirby's fan just edge fucked me off of the map!"
"Wow, Talim's throw down just Edge Fucked me off the map!"