IDFK
I don't freaking know
CensoredExample
IDFK where I left my cell phone. I hope it's in my car
IDFK means "I don't freaking know"
IDFK
IDFK definition by Slang.net
This page explains what the acronym "IDFK" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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Are you financially literate?
You can say IDFK (I don't freaking know) when you really, really DK something. Most often, people use IDFK when they're upset about not knowing something, to emphasize how angry they are.
For example, the fifth time your wife asks you where her car keys are, if you still have no idea where she put her own car keys, you could respond with IDFK.
On a related note, because the F in IDFK can be construed as a stand-in for crass language, you should consider not using it to respond to people's questions. Instead, respond with the much politer (and more commonly used) IDK.