eat someone's dust
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 dustAMERICAN
If 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 dustfall 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.