or Green-eyed Monster. Expressions used by Shakespeare (Merchant of Venice, iii. 2; Othello, iii. 3). As cats, lions, tigers, and all the green-eyed tribe “mock the meat they feed on,” so jealousy mocks its victim by loving and loathing it at the same time.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894