To fail, stop working, or die.
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To fail, end, or stop working completely.
When something bites the dust, it doesn't just struggle — it's finished, whether that's a plan, a machine, or a business.
It's informal and often slightly humorous, which is why people use it for small everyday failures too.
"Go Down the Drain"
—
Be wasted after effort invested
"Hit a Snag"
—
Meet a problem but continue
"Bite the Dust"
—
Fail or stop completely