Script (guión): Idioms, ‘yellow-bellied’ which means to be a coward. I have a friend who you can get to do anything if you suggest he is yellow bellied. For example, if I said, ‘Jim I bet you can't climb that wall.’
He'd say, ‘Errr, it's too dangerous.’
I'd say, ‘What's wrong. You yellow bellied?’
He'd be up that wall in a shot. We've also got him to do things such as jump out of planes, run through fired hoops, and more recently he ran down the road naked. So he certainly isn't yellow bellied.