offscum

offscum

(ˈɒfˌskʌm)
n
refuse or waste which is removed by skimming off
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The cases are too numerous to enumerate, such as improper construction of hydraulic engineering, excessively pumping ground water and liquid resources, destructive mining, or to emit the exhaust fume, waste water, offscum, noise, dust, odor gas, radioactive substance, vibration, Electromagnetic radiation, etc., the majority of which are connected with the legal person.