E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Green-Eyed Jealousy 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.