What exactly are "clipped" wings?
As far as I can find you may both be correct. The term originally was used to describe a stock aircraft having it's wings shortened after-market.
Here is a reproduction of the December, 1970 issue of SPORT AVIATION Magazine article comparing stock vs clipped
http://home.xcountry.tv/~dann/id72.htm

This modification has become well known and the clipped wing design sought after that there are planes (at least kits) being manufactured with "clipped" wings.
http://www.monocoupe.com/

It appears that whether is was done 'aftermarket' or manufactured that way, clipped wings are those that have been shortened from original design to improve aerobatic capabilities.

Hopefully that will give you some more points to debate over!

~Hoff