Jealousy

fight like cat and dog

Meaning: argue jealously and violently all the time

Example: The married couple fought like cat and dog the entire time they were together. Read more ➺

green with envy

Meaning: extremely jealous of another person

Example: Sally was green with envy when he saw my brand new car. Read more ➺

apple of discord

Meaning: something that causes trouble or unhappiness

Example: The right to host the next Olympic games has become an apple of discord between the two countries. Read more ➺