The “Black Bottom” (aka “Swanee Bottom”) was originally from New Orleans, later worked its way to Georgia and finally New York. Some say the “Black Bottom” was introduced by blues singer Alberta Hunter (which is probably true as many songs & dances were “stolen” and reproduced by someone else). However, it has been reported that the Black Bottom was derived from an earlier and similar dance called the “Echo.” The dance was done all over the South before Perry Bradford wrote his “Original Black Bottom Dance” in 1919.
Simple moves were created by natural movements, like the stomp was to imitate a cow’s feet stuck in mud.
The above info is posted below the Youtube video. Read more (a different story) about the supposed origins of this ’20s dance craze HERE, and watch another video from 1927 from the British Pathe archive: