RIP is an acronym for:

“I recognise that when we die, there is no heavenly afterlife that awaits us with a pre-specified number of highly experienced virgins, nor any hellish impossible-to-adapt-to inferno to contend with for all eternity, and neither is there the opportunity to be reincarnated, perhaps in a better looking body in more favourable circumstances, or even as a microscopic and insignificant single-celled organism miles beneath the ocean, as we are merely fleshy organisms which obey the laws of physics and will decay to reveal a distinct lack of soul, enriching the ground, extinguished forever, and for that I am sorry.”

I Sympathise With Your Loss.