Looks like the projectile for an old dummy round. How long is it?

Its about 30" long and about 5" in diameter at its base. It is not a dummy projectile.

Is it a cypress stump?

It is a tool used for a specific purpose.

Is it used to club bitches over the head?

one of my top 3 favorite posts in forum history

Is it some kind of wooden punch or something to splice rope?

http://en.wikipedia.org/wiki/Fid