Mustum Tortivum is a Roman term, denoting “must”, as in grape must, obtained from the second pressing of grapes that have already been pressed a first time. The first time, they were pressed by stomping. The second time, they were pressed with a mechanical press to squeeze any remaining juice out of them.
First-pressed wine was the considered the norm. Wine made from this second pressing must was considered inferior, and was used medicinally, and in taverns as a house wine.
A drink made from the dregs of the grapes even after this stage was called “Lora.”