Most commonly refers to "Who the fuck knows what I'm doing fuck yall", also sometimes used for "What the fuck, kick William in da fucking ass yo".
Amber - "Sup nig?"
William - "WTFKWIDFAY"
Amber - "Ok!" *kicks him in the ass*
William - "Not that definition!"
William - "WTFKWIDFAY"
Amber - "Ok!" *kicks him in the ass*
William - "Not that definition!"
by sasaraiharmonia January 14, 2009
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