dead fish vs wet rag

dead fish

noun

  • Used other than figuratively or idiomatically: see dead, fish. 

  • A sexual partner who lies flat and unresponsive during sex. 

  • A hit that travels a limited distance and then falls straight to the ground. 

wet rag

noun

  • Synonym of wet blanket 

How often have the words dead fish and wet rag occurred in a corpus of books? (source: Google Ngram Viewer )