What does Nemean lion's nerve means?

Answer 1

The quote is from Shakespeare's Hamlet.

Killing the Nemean Lion was the first of the labors of Hercules. He killed the lion by brute force when he found none of his edged weapons would hurt it. The only thing that could cut the lion's skin was one of the lion's own claws. Hercules used those to skin the lion, and is generally shown draped in that lion skin.

The quote was:

My fate cries out,
And makes each petty artery in this body
As hardy as the Nemean lion’s nerve.

When this was written, nerve was the term used for what we now call "sinew", so Hamlet is saying that the cry of his fate makes even his smallest arteries indestuctible.

Answer 2

Nemean Lions

Answer 3

I think that was in hamlet?
If you want definitions here you go.
http://www.linguasphere.org/dictionary/n-49029-Nemean_lion.html
What i think it means is the gladiator lion's that existed at that point in time and the nerve that they had.
So when the ghost calls hamlet what he might be saying is,"You say it against your will," just as a lion at this time was forced against his will to come forth into the gladiator.
That's William Shakespeare for you!