Something so mind-
boggling, so thrilling, that it might alter the course of the entire world! (or a
person's entire way of
thinking)
It may also be used in the
phrase below:
"Stop being so dramatic! There is no use in bawling like a baby just because you dropped your
spoon into the
toilet again! Oh, and
stop doing that already!"
See also:
Feature Request for Universe 2.0, which contains some good examples of things that are, or have the potental to be "dramatic".