(collectively) The sediment settled at the bottom of a liquid; the lees in a container of unfiltered wine. / (figuratively, the dregs) The worst and lowest part of something.

Sediment in a liquid. / (by extension) The lowest and most worthless part of something; scum.

plural of tofu-dreg

Okara, a food consisting of the insoluble parts of soybeans that remain after making tofu.

plural of tofu dreg, alternative form of tofu-dreg (“shoddy construction”)

(engineering, attributive) A poorly constructed building in China, or the shoddy material(s) used to construct it.