To bite the dust

[Oana]

Test No. incompl/advan-62 "Bite, Bit, Bitten", question 6

I'm very sorry to tell you that your scheme has failed and it has well and truly bitten the ..........

(a) powder
(b) dust
(c) fluff
(d) ground

Test No. incompl/advan-62 "Bite, Bit, Bitten", answer 6

I'm very sorry to tell you that your scheme has failed and it has well and truly bitten the dust.

Correct answer: (b) dust

Your answer was: incorrect
I'm very sorry to tell you that your scheme has failed and it has well and truly bitten the ground.
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Hi,
Could you please explain the sense of this sentence. I don't understand the expression from the end.

[Mosteque]

it simply means - it has died.

do you know the song by Queen "another one bites the dust" ??
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obsequium amicos, veritas odium parit