acronym for I Still Dont Know. used in chatrooms etc.
bob:do you know if your going to the party tonight?
john: isdk
Meaning I Seriously Don't Know!?
Isdk What's Wrong With Her Today?
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This word mean โI seriously donโt knowโ. People who use this word are to lazy to ask there parents to hangout so the day this lame ass excuse
Friend: why wonโt your mom let you come?
Me:Isdk