The primary ideology of planet earth. The idea is "we are fucked, everything is fucked, nothing can be stopped, there are no plausible ways to be a moral person anymore, therefore, let us party indefinitely."
It's an ideology that is present in the ruling classes as well as the working classes around the world. It has destructive implications in that it is a performative self-fulfilling prophecy.
"I used to be a libertarian. Now I don't really keep up with politics anymore. I believe in Partyboat Nihilism. Shots! shots! shots!"
A word from the popular game halo 3 started when in a doubles match against battlefield bob,someone named him partybob,the word is now used to annoy anyone who is not familiar with the term and is overused by simbo and kysahn :D