1) Any small quantity 2) Barrel bottom bit 3) Barrel remnant 4) Barrel-bottom bit 5) Bit at the bottom 6) Bit of coffee sediment 7) Bit of residue 8) Bit of sediment 9) Bit of wine sediment 10) End of doctor 11) Grounds 12) Last drop 13) Last little bit 14) Last remaining part 15) Lees 16) Leftover bit 1) Lees 
• (n.) 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.
Dreg noun [ Prob. from Icelandic dregg ; akin to Swedish drägg , confer Icelandic & Swedish draga to draw. Confer Draw .] Corrupt or defiling matter contained in a liquid, or precipitated from it; refuse; feculence; lees; grounds; sediment; hence, the vilest and most worthle...
[n] - a small amount of residue
noun a small amount of residue
the sediment of liquids; lees; grounds. · Usually,the least valuable part of anything: the dregs of society. · a small remnant; any small quantity.