Who is a coward?

Hey,

Here is the quotes from the funniest film I love:

-Boris, you're a coward!

- Yes, but I’m a militant coward.

 Who is coward?

Can you describe this personality and give some examples?

How do you deal with them? 

Heroism/bravery vs folly vs cowardly >> where is the edge?

I do hope it won’t be rhetorical discussion and I get the comments:)

Thank you