IDK
IDK definition by Slang.net
This page explains what the acronym "IDK" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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IDK is a popular acronym used to say "I don't know." It is often used as a one-word response to a question that you have no answer to.
The acronym can be seen almost anywhere online but is most frequently used in online chat and in text messaging. It may also be used by teenagers when they don't want to put forth any effort to communicate or explain how they are feeling.