bite the dust

Etymology:

• This idiom has its origin belong to Trojan warriors, who died during the war. It was thought that lots of people were dying during that era and most of them fell on earth. When their faces hit the ground their faces were covered with dust, especially their lips. It was thought that they got in contact with dust and used to bite their teeth due to pain of death, during the final moments. This idiom was used by English people also in the 18th century and it is used to describe enemies or unwanted people dying.