Prove Your Mettle

Also: Show Your Mettle Meaning of Idiom ‘Prove Your (or one’s)  Mettle’ To prove your mettle means to prove your ability at something by performing well in a difficult situation. 1Heacock, Paul.  Cambridge Dictionary of American Idioms. Cambridge: Cambridge UP, 2010.  Examples of Use “Gentlemen, we face tough opponents,” said the coach. “It’s time to … Read more