IDK

(In SMS-language:) I don't know
Found on http://www.mantex.co.uk/samples/texting.htm

Idk

town, northern Al-Buayrah mufaah (governorate), Lower Egypt. It lies on a sandy strip behind Ab Qr Bay, in the northwestern Nile River delta. ...
Found on http://www.britannica.com/eb/a-z/i/6

IDK

I Don't Know
Found on http://www.encyclo.co.uk/local/21662

idk

I don't know
Found on http://www.noslang.com/dictionary/i/

IDK

I don't know
Found on http://www.lagkills.com/gaming-acronyms.htm

IDK

I don't know
Found on http://www.chatslang.com/terms/online_gaming
No exact match found