I hadn’t heard of it before but I found this article on it:
It appears to be dynamically created css files using another special language “SASS” someone invented for the purpose. Not sure how I feel about that. Interesting concept but I wonder what problems it solves or does it just create new ones? I wonder.
Sass is one of several popular CSS ‘preprocessors’. It allows you to write variables in CSS, along with all kinds of other bits like ‘mixins’ and what not. Basically, it brings programming to CSS, which is very handy if you are doing CSS on a large scale. The Sass code gets compiled to standard CSS once you are ready to put it to use.