Dregs (noun)

The sediment or grounds at the bottom of a liquid, typically an undesirable or worthless residue.

Origin:

Late middle english: from old french dregges, of germanic origin; related to drag.

Examples:

1. The wine had been sitting for too long and had a bitter aftertaste from the dregs.
2. The coffee cup was filled with dregs, which had to be discarded.
3. The dregs of society are those who are considered the most undesirable and marginalised members of society.
4. He swirled the glass around to get the last of the dregs before drinking.
5. The dregs of the bottle of wine were left to the last person.