The most extreme variant of what the fuck. Considered to be one step above what in the actual fuck.
"Hey Tom, we're gonna need you to come in this weekend." "Really?" "Yeah. Also, the client moved the deadline from next month, to next Thursday..." "Okay...What in the absolute fuck?"
What someone is when they fuck up in a stupendously amazing fashion or are just incredibly stupid in general. Must be used with the following inflection:
"You're an absolute FUCKingwalnut!"
-After Dave finished his explanation why whites and blacks are different species-
"Dave, you're an absolute FUCKing walnut!"