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Fuck If I Know... used in response to something you either 1. have no idea about or 2. could give less shit about.
TJ: What time do we have to be at work?

Meaghan: FIIK. Whenever we get there.
by meaghanbrez August 23, 2008
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Fuck If I Know

Used when you are totally clueless or do not care about the subject matter.
A: Do you know who won the game last night?

B: FIIK man, I don't even like sports.
by Visible Ninja March 24, 2010
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Jane: "Hey, did I put the KD in the left cupbord or the right?"
Tom: "FIIK"
by TBA June 28, 2007
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Acronym: Fuck If I Know.

It is a definitive statement used primarily by those who are tired of answering probing questions into a subject that the user either does not know or could care less about. Usually employed in online conversation or when trying to watch one's tongue.
Example 1

Person 1: "Dude, Do you know where i put put my car keys"
Person 2: "Seriously for the twentieth time. FIIK!"

Example 2
after being interrobanged for the 18th time in the game of 20 questions by a significant other the answers can become shortly stated as FIIK
by user 824675 March 10, 2010
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