dead fish
Noun
Meaning
(slang) A sexual partner who lies flat and unresponsive during sex.
Synonyms: cold fish, starfish
(baseball, slang) A hit that travels a limited distance and then falls straight to the ground.
Used other than figuratively or idiomatically: see dead, fish.
Source: en.wiktionary.orgSynonyms
Examples
The opposite for courage is not cowardice, it is conformity. Even a dead fish can go with the flow.
Never forget that only dead fish swim with the stream.
Remember, a dead fish can float downstream, but it takes a live one to swim upstream.
No matter how hard you throw a dead fish in the water, it still won't swim.
In the lake of lies there are many dead fish.
A child's lie is like a dead fish in a pond that in the end, always comes to the surface, explains his mother.