What is a coward?

I’m babysitting my friend’s daughter today who is three years old. She, along with my 2 kids, are running around yelling “Show your face, coward!”. I asked them what they were doing and they informed me they were hunting snakes and that the snakes had cowards in them. “Oh,” I said, “what’s a coward?” First my friend’s daughter says she doesn’t know and then she says, “It’s kinda like a potato but it’s not.”

Who knew?