[noun] [informal]Good riddance is used to express happiness that someone or something unwanted has gone.The tax is due to be abolished at the end of the month - and good riddance.Some of his colleagues might be tempted to bid him good riddance.(saying) 'Good riddance to bad rubbish' means you are pleased that someone bad or something of poor quality has gone.We've got rid of the old computer system, and good riddance to bad rubbish is what I say.
RIDDANCE
Meaning of RIDDANCE in English
Cambridge English vocab. Кембриджский английский словарь. 2012