crucifix:

fabric passes under one shoulder and across the small of the back, supporting performer's weight. upper hand may be free as long as the fabric is trapped under the shoulder; lower hand holds tight, keeping fabric slightly in front and to the side of hip.

this is a very useful intermediate or end position (style the legs for a more interesting look), and a lot of other poses use the crucifix support (fabric under the small of the back, and trapped under a shoulder).