The abbreviation "WYF" most commonly stands for "Where You From?" or "Where are you from?" It is used as internet slang or texting shorthand to ask someone about their place of origin or where they live. This phrase is often used in casual conversations, especially in online messaging or social media, to inquire about someone's background or hometown.

Other less common meanings exist, but the primary and widely recognized use is the question about someone's location or origin. It is informal and suitable for texting or casual chats rather than formal writing.