Flatsokra
Flatsokra is a term that can refer to a few different things, primarily within the context of music and musical instruments. In some informal musical circles, flatsokra may be used as slang for a flat nine chord, often in jazz or blues contexts. This chord is created by taking a dominant seventh chord and adding a flattened ninth interval above the root. For instance, a G7(b9) chord would consist of the notes G, B, D, F, and Ab. The flattened ninth adds a distinctive tension and color to the chord.
Alternatively, flatsokra might be a misspelling or a phonetic rendering of a less common musical term or