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
This page explains what the acronym "IDN" means. The definition, example, and related terms listed above have been written and compiled 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.