IDN
I don't know
Example
I'm feeling sick 2day, so IDN if I'll going to school or not
IDN definition by Slang.net - The Slang Dictionary
This page explains what the acronym "IDN" means. The definition, example, and related terms listed above have been manually compiled and written by the Slang.net team.
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IDN is an acronym that stands for "I don't know," but instead of a "K" it uses an "N" for "know." It is the same as the IDK acronym but much less common.
The acronym is often used as a one-word response to a question to which you have no answer. The acronym is most frequently used in text messages and online, particularly on social media and in chatrooms.