joojup means in slang: It is versatile. This term can be used verbally, as an adjective, and even as a noun. It was originally used in Korea to refer to mooches and freeloaders. We all interact with joojups every day of our lives. Each of us has at least one or two joojup friend that we avoid. See examples. (in Slang Dictionary, added by Gavyn Mcmahon)