idktfw 

I don't know the fuck why (It's optional to put the why on it's own.
This is used when you're so confused with something you're pissed off.

Jakia: Well, I had no idea about this, but the rulers just imposed another rule: We have to wear black wristbands around our wrists for the school day.
Lunako: IDKTFW they added that, but they should expect another house bombing soon!

idktfw by MidnightStar18 January 29, 2021

IDKTW 

Abbreviation for "I Don't Know The World",
Meme

"What is the capital city of Sweden?" - "IDKTW"
"Are we still in Kansas?" - "Bark!" (IDKTW)

IDKTW by TwiTwi February 25, 2010

idktf

Internet or text message acronym for "I don't know that feel"

Dick: tfw your dad wants to take you fishing
Jane: idktf

idktf by Qaus January 9, 2015