An individual who approaches someone's desk or workstation in a work environment almost immediately after sending them an email, usually to confirm that the email has been received.
> Bill: I just sent you an email. Did you get it?
> Mike: Probably, I haven't checked.
> Bill: Can you check?
> Mike: Uh yeah, looks like I got it.
> Bill: Thoughts?
> Mike: My immediate thoughts are you're an email courier and a douchebag.
