Corrupt or defiling matter contained in a liquid, or precipitated from it; refuse; feculence; lees; grounds; sediment; hence, the vilest and most worthless part of anything; as, the dregs of society
disapproval If you talk about the dregs of society or of a community, you mean the people in it who you consider to be the most worthless and bad. He sees dissidents as the dregs of society
disapproval The dregs of a liquid are the last drops left at the bottom of a container, together with any solid bits that have sunk to the bottom. Colum drained the dregs from his cup