Question: what is the meaning of the idiomatic expression green with envy?
Answer: Full of desire for someone's possessions or advantages; extremely covetous. For example, Her fur coat makes me green with envy. Shakespeare described envy as the green sickness (Anthony and Cleopatra, 3:2), but the current phrase, dating from the mid-1800s, is the one most often heard. Also see green-eyed monster.