Refuse (noun): worthless or useless part of something.
(Prounuced 'ref-use', rhymes with 'refuge'.)
(Prounuced 'ref-use', rhymes with 'refuge'.)
Ref-use: ref as in referee, use as in noose, or loose.
But then in en-gb we'd say "waste" or maybe "rubbish".
In the US we say ref as in referee, use as in news or lose, fwiw.