un is a common abbreviation used in online chats and social media, with multiple meanings depending on context.
Main meanings of un:
1. Short for "you know" in text messages
2. Abbreviation for "United Nations"
3. Prefix meaning "not" or "opposite of" (from Latin "un-")
4. Internet slang for "unfollow" or "unfriend"
5. Gaming term meaning "unequip"