Synonyms for Dregs:

n.

nothing, irrelevance, trivia, inessentials, stuff, adjunct, non-issue, Minutiae, dead wood, detail, lees. condensation, leak, refuse, river, jet, moisture, trickle, drop, spatter, splash, sip, riffraff, trash. bad person (noun)
trash, scum, riffraff.
dregs (noun)
settlings, grounds.
object (noun)
settlings.
remains (noun)
lees.
residue (noun)
remainder, residue, afterglow, remnant, chaff, dross, slag, scum, leftovers, artifact, debris, afterimage, Filings, vestige, sediment, grounds, precipitate, detritus, sawdust.
residues (noun)
precipitates, deposits, remnants, sediments, remainders, Afterimages, detrita, residues, vestiges, Artifacts, chaffs.
sediment (noun)
settlings, deposits, residue, lees, slag.
waste (noun)
chaff.

v.

remains (verb)
lees.

Other synonyms:

rubbish
trash.
Other relevant words:
riffraff, trash, refuse, lees, settlings.

Usage examples for dregs

  1. He would enjoy this one more evening of pleasure, this night of joy; drain it to the dregs – The Complete Historical Romances of Georg Ebers by Georg Ebers
  2. Well, I shall have tasted the cup of bitterness to the very dregs but I do not complain. – Real Soldiers of Fortune by Richard Harding Davis
  3. Wait till you've been in this country as long as I have, and you'll respect mules as I do, from army mules down to the lowest dregs of the mule kingdom. – The Golden Silence by C. N. Williamson and A. M. Williamson