When you have to write a paper but have very little to say, so you pad the final copy by installing ridiculously wide margins that make your meager text spill over to a larger number of pages.
Dude 1: What am I gonna do!?! I'm supposed to have six pages by three o'clock for this forestry paper I'm writing, but all's I can manage is two and a half, man.
Dude 2: Did you Courier New
it like I taught ya?
Dude 1: 'Course. I'm not a complete fool, though I did forget to consider the Margin of Air - that always works!