foaming at the mouth: o que isso significa?

Have you ever felt so angry people compared you to a dog foaming at the mouth? If you don't know what that means, when a dog foams at the mouth, they get very angry and it means they're very dangerous because it might have some kind of disease. When someone, on the other hand, is foaming at the mouth, it doesn't mean they have literally foam around their mouth, they're just extremely angry at something or someone.

For example, you find out your boyfriend has been cheating your with your best friend. You're so angry at both of them it seems you're almost foaming at the mouth. The same would happen if you found out your son has been skipping classes every day at school. You're so mad at him it seems you're foaming at the mouth, and he gets scared at you. That's it for today. Take care!