"Bite the dust" is a well-known idiomatic expression that refers to the act of failing or being defeated. However, there are many other words that can be used as synonyms for this common phrase. Some of these include "falling short," "coming to an end," "meeting one's demise," "fizzling out," "crashing and burning," "going under," "throwing in the towel," "meeting defeat," and "being vanquished." These phrases can all be used to describe a situation where someone or something has failed or come to an unceremonious end. It's always useful to have a variety of synonyms at your disposal, so consider adding these to your vocabulary to better express yourself!