"kiss/bite the dust"

Friday, January 22, 2016 "AY, what does it mean 'to kiss the dust?' " That's a question I was asked by a friend. MY ANSWER: That is an idiomatic expression which means: "To fail, to be disappointed or defeated". Most often than not, it is "bite" that substitutes for "kiss", in that idiom. "kiss the dust" "bite the dust" Both mean the same: "to fail, to be disappointed or defeated." e.g. Despite how hard she tried, she kissed/bit the dust. (That means she failed.) Is that okay?