Top Definition
I Don't Even Fucking Know.

Usually said when your really do not fucking know.

xD.
AIMPerson1: Dude, where do I stick my penis into her?

AIMPerson2: Bro, IDEFK.
by LFJoooooonnnneeeessss September 21, 2008

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I don't even fucking know. This can be used when you just have sheerly not the slightest idea what the answer to a question or problem is.
boy: "Wtf is free running?"
girl: "Oh god. Idefk."
*girl goes on and attempts to explain it.*
by lovesonic April 02, 2010

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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Acronym for: I DON"T EVEN FUCKING KNOW
(most of the times said when really frustrated, or over whelmed, or pummeled with questions, that you don't even fucking know the answers to.)
Jacky: "Why hasn't he called you? Do you think your bf is mad at you? Sam, Sam, Sam... whatcha gonna do about it???? HUH?!? I think he's gonna break up with you... what are you gonna do?!?
Sam: "IDEFK!!!!!!!"
by Mariah Levine June 02, 2015

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt