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A texting way of saying "I don't even fucking care".
Example:
Lisa: Did you know Miley Cyrus was tweaking in a public restroom?

Sean: idefc so shut up!
idefc by The Lost Wish January 7, 2016
Related Words
idrfc about you anymore
idrfc by dalejr5076 December 20, 2008
I dont even really fuckin know" mostly pronounced as a phonetic word (ih-durfk) as opposed to saying each letter individually (ai-dee-ee-ar-ef-kay). However, either can be used. In many cases "iderfk" is used in conjunction with "idgaf
Teacher: "Johnny, What is the answer to #9?"
Johnny: "uhmm, c=5"
Teacher: "What theorem does this prove?"
Johnny: "iderfk to be honest with you, and idgaf either"
iderfk by penileaviationmajor July 18, 2011

IDEFCYIBT 

Short for "i dont even fucking care you idiotic bitch testicle"
IDEFCYIBT!!!!!!!!
IDEFCYIBT by xX 44100 Xx October 14, 2021

Idefcbikyab 

I don't even fucking care because I know you a bitch
Gavin: I wanna break up

Vicktoria: IDEFCBIKYAB
Idefcbikyab by anonymous March 23, 2020
It's stands for "I DON'T REALLY F*CKING CARE" it's a rude way to tell someone to I don't care
IDRFC you can't even make any people traumatized
IDRFC by ImRealic September 24, 2025