The sediment of liquors; lees; grounds; feculence; any foreign matter of liquors that subsides to the bottom of a vessel containing them.

Waste or worthless matter; dross; sweepings; refuse; hence, what is most vile and worthless: as, the dregs of society.

Solid impurities found in raw fats. W. L. Carpenter, Soap and Candles, p. 83

noun. The sediment settled at the bottom of a liquid; the lees in a container of unfiltered wine.

noun. The worst and lowest part of something.

noun. sediment that has settled at the bottom of a liquid

"I took a leaf (or bag) from my pantry and filled the flavour gap with the subtly nutty Kamut flour I found there, as well as pouring in the dregs from a carton of almond milk in my fridge."

to drainthe cup to the dregs  

deposit  sediment  

grounds  

begs  eggs  kegs  legs  negs  

aftertaste  dross  gulp  mire  mouthful  

alluvion  alluvium  ash  bones  bottoms