Idk meaning: What does the abbreviation IDK stand

What does the abbreviation IDK stand for? Meaning: I don't know. How to use IDK in a sentence. IDK meaning is straightforward: IDK stands for “I don’t know.” This three-letter acronym functions as a fast, casual reply used across texting, social media, chat apps, and comment threads. Although brief, IDK carries tone, context, and conversational intent, far beyond a simple admission of ignorance. IDK meaning explained with real examples, slang use, and 2025 context. Learn what IDK means in text, TikTok, and everyday chats. The meaning of idk remains the same regardless of the sender's gender: " I don't know." It's an informal way to express uncertainty or lack of information in text-based communication.