Script (guión): Idioms, ‘bad egg and good egg’. Got two idioms here. First of all, bad egg, a bad egg is a person who cannot be trusted. A good egg is the opposite. Timmy Edwards was a bad egg. If you didn't keep close watch of him, he would steal your wallet. He would even rob his grandmother some people said. However his brother Johnny was a good egg. He was the captain of the school football team and was the head boy at school. Everyone liked and trusted him.