waste matter(n = noun.substance) waste, waste material, waste product - any materials unused and rejected as worthless or unwanted; "they collect the waste once a week"; "much of the waste material is carried off in the sewers"
is a kind of material, stuff
has particulars: dross, impurity, exhaust, exhaust fumes, fumes, body waste, excrement, excreta, excretion, excretory product, crud, filth, skank, sewage, sewerage, effluent, sewer water, wastewater, food waste, garbage, refuse, scraps, pollutant, rubbish, scrap, trash, slop, toxic industrial waste, toxic waste

alkali waste, as a matter of fact, back matter, body waste, conservation of matter, crux of the matter, dark matter, end matter, faecal matter, fecal matter, food waste, for that matter, foul matter, front matter, gray matter, grey matter, high-level radioactive waste, human waste, law of conservation of matter, lay waste, lay waste to, laying waste, low-level radioactive waste, matter, matter of course, matter of fact, matter of law, matter to, minor matter, no matter, no matter what, no matter what happens, nontextual matter, particulate matter, permissive waste, pictorial matter, printed matter, radioactive waste, reading matter, state of matter, subject matter, tabular matter, textual matter, toxic industrial waste, toxic waste, toxic waste area, toxic waste dump, toxic waste site, vegetable matter, waste, waste away, waste basket, waste material, waste of effort, waste of energy, waste of material, waste of money, waste of time, waste one's time, waste paper, waste pipe, waste product, waste time, white matter, written matter