Definitions by Kriegenmeister

dirty butter 

The act of fisting a female while milk is in her vagina. The arm acts as the churner while the vagina acts as the churning bucket. Also, I hope most of you can realize this really doesn't make butter.

The chick is this video makes some dirty butter.
Warning: 18+ video and quite sick and oddly funny http://www.redtube.com/6176

dirty butter by Kriegenmeister August 19, 2008