A person that doesn't reply to e-mails or texts unless these are of immediate interest to themselves. These people are self-absorbed asshat
s that are interested only in their personal needs and desires and have no concern for the effects of their behavior on others.
John never replies to e-mails unless there's something directly in it for him, he's some kind of digital sociopath.
Jane's so self-obsessed that she won't text back unless you say something about her, she's a total digital sociopath.