Stillage, draff, dredge - desztilálás után visszamaradt (lényegében alkoholmentes) anyag.
Thin stillage - a fentiből eltávolítják a szilárd halmazállapotú anyagokat, és a folyadék, ami visszamarad az a THIN sillage.

The residual water and corn solids that remain after the distillation process are called “stillage.” This whole stillage is then centrifuged to separate the liquid (thin stillage) from the solid fragments of the kernel (wet cake or distillers’ grains).
The remaining thin stillage passes through evaporators to remove a significant portion of the water to produce thickened syrup. Usually, the syrup is blended with the distillers’ grains and dried to produce an animal feed called “distillers’ dried grains with solubles” (DDGS).
www.thebioenergysite.com/.../how-fuel-ethanol-is-made-from-...

After fermentation, unfermented components are collected from the distillation process as whole stillage and centrifuged to generate thin stillage and wet grains.
Unrecycled thin stillage from the centrifuge is thickened in a series of 8 evaporators to generate syrup...
www.gobiomass.com/article.cfm?id=26670

A cefre angol neve mash, - cefrézés: mashing.