sperm, a single cell containing half of the father male original genetic composition. by meeting up with the female egg it will fertilize it and start to grow to a full person.
death drop unknown A type of dance when a dancer dramatically falls backwards into a struck pose on the ground, usually to end a dance. turn turn turn stop and death drop!
Oh and regarding the one drop is death issue, although true it makes the concrete set slightly harder (negligible if your concreter did a decent initial job), the issue is more one of aesthetics. If it's being rained on and off and is not smoothed afterwards you run into the chance of it not having as smooth a finish.