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1.
The act of attacking and killing an enemy (in the face) with a blunt object. (Usually the butt of a gun)

-- This nonsensical phrase is most often used to confuse and grief players of popular video games. Originally created and used in Halo 2, this phrase is quickly becoming a popular edition to the "Lemon juice in an open wound" style of trash talk.

-- An annoying term used against an opponent to cause confusion and disarray. It is generally followed by "Too easy! Sit the fuck down!"

-- An equivalence of: Your Mom, pWnEd, and Fucking Noob!
1. Gamer "X" Beat down Gamer "Y" in the "BACK OF THE FACE"

2. (after killing an opponent, said in rapid succession) - "BACK OF THE FACE!, BACK OF THE FACE!, BACK OF THE FACE!"

3. (Followed by subsequent insults) - "BACK OF THE FACE!, TOO EASY!, SIT THE FUCK DOWN!"

4. (After receiving a "back of the face" death,) - "That doesn't even make sense you cant hit someone in the back of the face!"

5. (After receiving a "back of the face" death,) - Your mom's a back of the face..."

6. (After receiving a "back of the face" death,) That doesn't even make sense, what the fuck is the "back of the face?"
by E. Wilk, Tom. H November 30, 2007
 
2.
back of the face
The back of part of the head opposite the face.
"Did that hit you?"
"Yeah, right in the back of the face!"
by Ace8904 January 29, 2008