All the humans together, referring to the genes for reproduction. Mainly used for removing yourself from the gene pool, either by doing something that makes you unable to reporduce yourself, like celibaly or getting sterilized, or by getting yourself dead (in a very stupid way). Very popular on Darwin Awards.
Removing yourself from te gene pool is seen as positive evolution since you won't spread your genes anymore, which is a good thing since you are very stupid (according to the way you died).
He removed himself from the gene pool by falling into the shredder's hopper while cutting branches.