A situation where people in group A compete in their minds with
people in group B, while the people in group B are barely aware
group A exists and would laugh at the idea of competing with
them if they thought about it.  Examples: Harvard vs. MIT,
CalTech vs. MIT, Linux vs. Microsoft.  Perhaps most impressive
is the string of one-way rivalries that extends all the way from
the East Coast to the West Coast. MIT thinks they are rivals
with Harvard, CalTech thinks they're rivalling MIT, and
meanwhile, the little-known tech school Mudd half an hour or so
away in Claremont thinks they rival CalTech. Mudd finds the one-
way-ness rather amusing, given that we certainly do rival them
academically, and compete with them over prefrosh (I
preemptively rejected CalTech to get into Mudd Early Decision).
Nonetheless, Mudd cares about making fun of CalTech far more
than the reverse is the case.  After the infamous CalTech Cannon
incident (http://people.bu.edu/fmri/somers/cannon.html), one
would think the latter school would