1. rush forward ahead of another, abandon
try not to be left in the dust, we'll leave them in the dust
To leave something or someone in the dust means they are far behind in a race, competition or business venture. If you are left in the dust, you are outdone or it is impossible to keep up with someone or something. "The new electric car reaches speeds that will leave diesel cars in the dust." "Our new product will leave our competitors in the dust." This phrase is a metaphor related to speeding cars on dirt roads.