“WYD” is an acronym for “What are you doing?” It is a common question used in text messaging and online chat to ask someone what they are currently up to. The best response to “wyd” depends on the context of the conversation and the relationship between the two people involved.
In general, it is polite to respond to a “wyd” text with a brief description of what you are doing. For example, you might say, “I’m just hanging out at home” or “I’m on my way to work.” If you are busy or don’t want to talk, you can simply say, “I’m busy right now” or “I’m not really up for chatting.”