Most commonly used as a shorter version of "i don't know" but in most occasions you don't give a crap about what there saying therefore it becomes" i don't care" because really, you don't.
1: Hey
2: Hey
1: wuu2?
2: Have a guess
1: idk
2: Have a go!
1: no i'm serious idk
2: Blah, Blah, Blah, Drone...
by Gabbbzzz January 27, 2009
idk corp.
i work at idk corp.

by moo...ur face January 07, 2009
by Ronald Reagan pep master October 26, 2008
an abbreviation for I Don't Know
idk anything about it
by Fawaz October 11, 2003
A dumb and unsophisticated way of saying "I Don't Know." Usually used by lazy teenagers who spend their time going on myspace and drinking orange soda.
guy 1: Do you know what 2+2 is?
dumb teen: idk
guy 1: My house is on fire! What should I do?!
dumb teen:uhhhh...... idk....get insurance?

teacher: Karie, you wrote "IDK" on all of your test answers. Could you explain why you did this?
dumb teen: uhhh......IDK.......

-scratches head-
by JeanieXO October 21, 2009
I dont know. Usually used to show you dont understand some thing.

Used in the examples below:
Izzy: Mate
Emma: Yh
Izzy: Whats 4x4?
Emma: IDK?
by emotionalemma July 15, 2009
An abbreviation commonly used for the word I don't know. It is used online by many people in programs such as AIM or MSN to save time.
Also made famous by the commercial "idk my bff gill?"
So0 SaRaH sAiD (12:41:34 AM): i was supposed 2 go online and figure out how i find out how many texts ive sent this month '
Fangzhou14 (12:41:45 AM): oh.... lol
So0 SaRaH sAiD (12:41:49 AM): but idk how
Fangzhou14 (11:35:15 PM): that's the 187th time you said idk.
by Fangzhou June 25, 2007

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