Sentance Mixing is a very diverse and popular element in YouTube Poop. It involves manipulating already said sentences from a source and using them to create new words and phrases (i.e., someone says 'fire truck' and it is edited to make the word 'fuck'.) It is slowly becoming popular.
It's widely seen mostly in CDi-oriented poops, as seen in Sentence Mixing is for Pussies by cjflo. Other sources can be edited as well, such as advertising campaigns by Billy Mays, political debates, and much more.