Knights in white satin…ok, maybe not. This is a stitch for filling in the blank space inside the outline. Very time consuming which is why I prefer the quickie method of applique using solid or patterned fabric and use the outline or split stitch around it.
One of the first stitches to learn in sewing or embroidery. In sewing, where the stitches are long it’s known as “basting.” Nothing to do with turkeys.