when someone dosent like another for no known reason other than not being like them. They wish they were like them so much that they start to hate themselves and tell people they hate the person they are jealous yet theres no real reason other than that person dosent think you're good enough. The jealous individual will do anything to see the one hes jealous of fall. For instance spread rumors, bully them, try to make it look like they are bigger than he is, etc.. at the same time they try to imitate you.
Michael was so jealous of him he went to incredible lengths to see him fall.