The phrase ‘Green with Envy’ means to be very jealous, envious.
Example of Use: “Katie was green with envy when she saw that you got a new car for your birthday.”
Before Shakespeare’s days, a pale (green) complexion was associated with fear, illness, and poor humor. The origin of the idiom 'green with envy' is believed to come directly from the great William Shakespeare himself. In Othello, Iago warns Othello: “Beware, my lord, of jealousy; it is the green-eyed monster which doth mock the meat it feeds on.”