sawdust

chaff; worthless stuff

rice husk

to sift chaff; (fig.) to shake all over

rice bran

chaff, husks, distillers' dregs etc (food eaten by the poor); (fig.) rubbish; junk; (abbr. for 糟糠妻[zao1 kang1 qi1]) wife who goes through the hardships of poverty with her husband

grain chaff

breadcrumbs