DIKU
DIKU definition by Slang.net
This page explains what the acronym "DIKU" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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When someone you messaged does not recognize your name or number, they may respond with DIKU (do I know you). Before continuing your conversation, you should let this person know who you are.
Most often, you'll receive DIKU after you've switched phone numbers or when messaging someone for the first time. For example, if you text your brother's GF and she doesn't have your contact info, she may respond with "I'm sorry, who the heck is this? DIKU?"