(Verb) to describe an individual who expresses themselves only via electronic communications.
Individuals of this description tend not to explain their feelings to you on a face-to-face basis, they will see you and maintain composed and polite, then hours later will e-mail you with issues they have about you. When you then confront said individual about their e-mail they will act coy or defensive.
So I saw Janet this morning, and she was cool, smiled, and waved goodbye. Then I get to work and she's emailed me saying I'm this, that and the other. Why not tell me this when she saw me, that girl is too emaitional.