Bias Cut.
That's a pretty good definition, with a diagram and everything. Madeleine Vionnet was a pioneer of bias cutting in the 20s and 30s, and
the cover of this book about her gives you a pretty good visual idea of how fabric drapes when it is cut on the bias.
For any and all clothing construction questions, I'm your woman.
Good show. I've heard good things about The Believer but haven't had any firsthand experience with it. I think I will be availing myself of that cheap back issues deal (thanks rachellander!)