Wiktionary
dirt nap
n. (context idiomatic indelicate English) A state of permanent rest; the state of death.
Usage examples of "dirt nap".
Sure, you laugh now, but you'll never get into a good preschool with a father who puts people down for their dirt nap.
When the Mayor, who was on the payroll, informed the crimeboss, it was decided that the crusader should take a dirt nap.