The term "wyd" in a text message translates to "what you doing?" It is a slang term used to ask someone what he is currently doing.
The term "wyd" removes the word "are" from the acronym as a grammatically correct way of saying the term is "what are you doing?" "Wyd" is usually used to initiate text messaging conversations. It is used to make plans to hang out with another person. A related acronym, "hmu," which stands for "hit me up," is used to close conversations. "Hit me up" indicates that a person wants to be contacted at a time in the future.