Answer:
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
You throw me out when you use me and take me in when you are done. What am I?
If two's company and three's a crowd what are four and five?
What goes in the water black and comes out red?
I am all around you but you cannot see me. I have no throat but you can hear me. Valued during summer but despised in the winter.
A little house full of meat, no door to go in and eat.