green-eyed monster

Green-eyed monster is the cliched term used most often when speaking of jealousy. This is a very common idiom used when speaking of someone who has jealousy. The jealousy can be over anything someone might be jealous of such as a person, the things someone is able to do, the places they go, or the position they are in. Jealousy has a range of severity from mildly admiring to obsessively jealous over something or someone.