IYDK

If you didn't know, or In case you didn't know

George Bush's birthday is July 6th, IYDK.

by Leo_Arthur December 19, 2006

iydk

Stands for "Incase you didn't know".
To imply something useless/things that doesn't concern anybody.

Guy #1 - iydk I just came to midget porn.
Guy #2 - Thanks for letting me know,concerns me alot.(sarcasm)

by HazePoniPoni February 18, 2015