phrase
The Green-Eyed Monster
Jealousy, personified.
Origin
Iago warns Othello: 'O, beware, my lord, of jealousy; / It is the green-ey'd monster which doth mock / The meat it feeds on.' Then, of course, he proceeds to feed Othello's jealousy until it destroys him.
Modern usage
Standard English for jealousy, often in advice columns and pop psychology.
Tags
jealousy
emotion