Rubbish
garbage, waste, refuse, dregs, filth, litter, debris, dross, oddments, sweepings, rubble, odds and ends, offal, junk, sediment, leavings, droppings; see also excess 4, residue.
Antonyms money*, goods, riches.
Persons regarded as of little account
beggars, thieves, outlaws, the poor, the lower class, hobos, tramps, hoi polloi, (Greek), sans culottes, canaille (both French), wastrels, poor whites, sharecroppers, guttersnipes*, varmints*, good-for-nothings*, white trash*; see also rascal.
Antonyms aristocracy*, the upper class, the wealthy.
Waste matter
stuff, frippery, rags, scraps, scrap, scourings, fragments, pieces, shavings, loppings, slash, rakings, slag, parings, rinsings, deads, debris, shoddy, scoria, recrement, residue; see also sense 1.
Nonsense
drivel, twaddle, prating; see nonsense 1.