yesterday's fish and chips en · NOUN
Etymology
Referring to the use of newspaper to wrap fish and chips.
Meanings
-
(colloquial, uncountable) Old news.
To begin with it has a powerful aroma of yesterday's fish and chips. The school was held well over four and one-half years ago […]
1975, JBIS: Journal of the British Interplanetary Society:However there was no way that this story was ever going to become “yesterday's fish and chips”. It just went on and on.
2009, Steve Morris, In All Probability, page 74: