A phrase which has a meaning that is commonly understood by speakers of the language, but whose meaning is often different from the normal meaning of the words is called an idiom.
Cut the mustard (UK) If somebody or something doesn't cut the mustard, they fail or it fails to reach the required standard. Contributor : Unknown .....................................................................................................................
Curry favour If people try to curry favour, they try to get people to support them. ('Curry favor' is the American spelling.) Contributor : Unknown .....................................................................................................................
Curate's egg (UK) If something is a bit of a curate's egg, it is only good in parts. Contributor : Unknown .....................................................................................................................
Crème de la crème The crème de la crème is the very best of something. Contributor : Unknown .....................................................................................................................
Cream of the crop The cream of the crop is the best there is. Contributor : Unknown .....................................................................................................................