From Longman Dictionary of Contemporary Englishgood riddance (to somebody)good riddance (to somebody)spokenGET RID OFHAPPY a rude way of saying you are glad someone has leftShe was awful. Good riddance to her, I say! →riddance
Examples from the Corpus
good riddance (to somebody)• If they can't accept me as I am, good riddance.• So any docks, dandelions and creepingbuttercup go straight to the tip and good riddance to them too.• To man qua man we readily say good riddance.• But if this is what the club resorts to than good riddance to them.• We were all annoyed with him over not helping with the hay, and I thought good riddance.• Then I thought: good riddance.