IDIOMS

Can't make heads or tails of something: you can use this idiom to say when you can not understand something at all. When you find something confusing and illogical. For instance, I can't make heads or tail of your e-mail, are you having problems with your computer?

Bad-mouth: this idiom is used to express or say unkind, unflattering, embarrassing (and probably untrue) things about someone. For example, I don't believe what Bob said. Why is he bad-mouthing me?