dregs
n[pl]
1 solid particles that sink to the bottom of certain liquids, esp wine and beer 沉淀物(尤指葡萄酒和啤酒中者).
2 (fig 比喻) worst and most useless part (of sth) 残渣; 渣滓
the dregs of society 社会的渣滓.
3 (idm 习语) drink/drain sth to the `dregs drink all of sth 喝乾; 喝光.