Expression used when someone dies doing something stupid. Can alternatively be used for the deaths of people deemed unworthy of reproduction.
Likens the dead to microbes in a metaphorical gene pool, chlorine being a chemical used to kill microbes in actual pools.
βDid you hear about the robber who got killed robbing a 7-Eleven with a fake gun?β βMore chlorine in the gene pool, huhβ
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Similar to being called a "mudblood" in Harry Potter. It means that you're a mutated being in human existence. Often used as a very rude insult maintaining that you are superior to them.
Person 1: I don't want to go to work today...
Person 2: Go straddle a narwhal, you chlorinated gene pool.
6π 23π