English Idioms About “Science”
Idiom: Reinvent the wheel
Meaning: To waste one’s time doing something that has already been done satisfactorily.
Example: Just use our guide book to and don’t try to reinvent the wheel.

English Idioms About “Sport”
Idiom: Throw in the towel
Meaning: (Also throw in the sponge) to admit defeat.
Example: After a long fight agaisnt his enemies, he finally threw the towel.

English Idioms About “Animals”
Idiom: No spring chicken
Meaning: Said of a person who is no longer particularly young.
Example: Although he’s no spring chicken, he runs fast.

English Idioms About “Money”
Idiom: Pay your dues
Meaning: The phrase pay your dues means to earn respect or a position by a lot of hard work and sacrifice.
Example: They want me to resign, but everybody knows that I paid my dues to get this position.

English Idioms About “General”
Idiom: Mister Right
Meaning: A perfect, ideal or suitable mate or husband.
Example: She waited for years and years, hoping someday to find Mister Right.

English Idioms About “Clothes”
Idiom: Have a card up your sleeve
Meaning: To have a secret plan
Example: She still has got something up her sleeve, and it should solve all her problems.