What does "bit the dust" mean here?

Native speaker’s answer
Rebecca
To "bit the dust" means to end, fail, or be killed. In this video, the woman says "and bit the dust" to mean that the lover dies. Ex: Wow, that competitor is out of the race too. Looks like another one bit the dust. Ex: I just took out the last enemy sniper with a head shot! Looks like he bit the dust.