A TUG flap is one of the many free perforator flaps used for breast reconstruction. The acronym stands for Transverse Upper Gracilis flap. The flap is harvested from the inner upper thigh tissue directly over the gracilis muscle, and the donor defect will be a crescent incision in the groin crease. This flap can be thick or thin depending upon the amount of subcutaneous fat present in the inner thigh. Usually it is not a first choice flap because commonly the flap is too thin.