English Idioms About “Law”
Idiom: Necessity knows no law
Meaning: Necessity knows no law is a proverb. It means that being desperate and having no means may lead you to do illegal things.
Example: He was dealing in illegal drugs because he had to feed four kids. Necessity knows no law.

English Idioms About “Animals”
Idiom: Have other fish to fry
Meaning: (Also have bigger fish to fry; have more important fish to fry)to have other things to do; to have more important things to do.
Example: I can’t answer your question. I have other fish to fry.

English Idioms About “War”
Idiom: All’s fair in love and war.
Meaning: In love or in war, you are allowed to be deceitful in order to get what you want.
Example: To get her to go out with him, he lied and told her that is very rich. All’s fair in love and war.

English Idioms About “Weather”
Idiom: Blue-sky thinking
Meaning: This refers to thinking that is unrealistic. This phrase may also refer to creative ideas that diverge from current beliefs or ideas.
Example: Blue-sky thinking has long been denigrated, and because of the economic recession, such fanciful thinking may even be considered downright irresponsible.