An
ellipsis tease is what occurs while you're
chatting with someone on
IRC, or
AIM, or
ICQ, and they put an ellipsis (
...) at the end of their
sentence, but then fail to
follow it up with any added commentary, which the
ellipsis led you to believe was coming. As a result, you're just left there wondering if they're going to complete their
thought.
Not to be confused with simple overuse of the precious ellipsis, which can create a William Shatner type effect, and can be equally annoying.