Mumblecore - A subgenre of independent film characterised by naturalistic acting and dialogue, sometimes improvised, low-budget, an emphasis on dialogue over plot, and a focus on people in their 20s and 30s.
And if you need to practice your stream-of-consciousness mutterings, simply make YouTube videos on anything with your face upfront and your mumblings barely discernable.
Please don't get saucy with me, Miss. Our friendship is way pasta stuff like that, don't you think? Now finish your dinner, and stop making such a mess.