eat (someone's) dust
To be outperformed or outrun by someone, usually by a very wide margin. The veteran runner was performing at the best of his career, and everyone else in the race ate his dust. We've been eating the competitor's dust since they released their new line of smartphones.
eat someone's dust
AMERICANIf you eat someone's dust, you are a long way behind them in a race or a competitive situation. If you ignore new production methods, you will have to eat your competitors' dust.
eat someone's dust
fall far behind someone in a competitive situation. North American informal 1993 Fiddlehead She let everybody know she was moving on to True Love and they could eat her dust.