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15.
idk
1. three simple letters that, together, they form a word meaning 'i don't know' in aim lingo. typing 'idk' instead of 'i don't know' is much faster and easier.

2. this word/combination of letters is most commonly found in the same phrase as, "idk, my bff jill?" this phrase is found in those texting commercials.
1. emmy: soo what do you wanna do today?
mary: umm, idk.

2. emmy: who stole my cookies?!
mary: idk, my bff jill
emmy: oh.
by ~lexii~ July 04, 2008
 
16.
idk
1) An abbriviation of "I don't know"

2) A term used by all the hip and with-it optometrists in the context of the severely visually impaired
1) "Hey are you gonna be able to go to that thing at that date and time upon which we agreed earlier?"
"Idk... maybe."

2) "Yo Thompson, check out this fool here, he's got some legit idk creepin in."

"Thas wack, brotha."
by Teh K March 01, 2010
 
17.
idk
Short For I Don't Know
Jeff:Do You Want To Go To The Movies?
Bob:idk
by Seagulls Of Satan August 04, 2008
 
18.
idk
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
 
19.
idk
I Don't Know.
Blonde : What's IDK mean?

Brunette : I don't know.

Blonde : Ug! Nobody knows!
by noʎ ʞɔnɟ November 18, 2009
 
20.
Idk
Idk- is to say i dont know
commonly misconfuesed with idc witch mean i dont care
idk is a texting term but some times used in verbal conforosations
'what are you doing today"
"idk"
"do you want to do something"
"idc"
by KeepSnakes June 25, 2009