The hypothetical amount of code needed to solve any given problem, as given by a professor I once did research under. A running joke with everyone else that worked with him.

A typical conversation where this phrase would occur:
Grad Student: So you want a program that will generate surface data given 3 pictures of a room and some camera position data, by next tuesday?
Professor: Well, all you have to do is choose edge points and set up some matrices. From there it's just two lines of code.