When something isn't just exactly the case but it's exactly the fucking case. Used as a sign of agreement, support or just a way to say "Hey I was thinking the same thing!"
"Dude, guess what i'm thinking"
"Bananas. No giraffes. Wait banana giraffes!"
"efuckingxactly Stan"
"You know that gravity thing, it's fucking useful"
"Efuckingxactly"
I made this word because I wanted another way to stress getting my point across better. It can be used instead of exactly, especially when pissed off or stressed.