FPP is an acronym for Front Page Post on MetaFilter. It is just a term used for a post made to the website.

A euphemism for “kill me” now that composting oneself after one’s death has become popular.

FPP is an acronym that means "for poor people". To be used as a rebutle when someone mentions something that those without money would be into.

Fat People Posse:a gang of fat JUGGALOS,any one whos proud to be fat is in it!

An abbreviation for "Fantasy Prone Personality." A disposition in which someone experiences a lifelong extensive and deep involvement in Fantasy. In some cases causing difficulty differentiating between fantasy and reality and may experience hallucinations, as well as self-suggested psychosomatic symptoms.

First person porn. Pornography where the camera is angled to make it look like you're taking place in the act.

Short for "fat people problems" used with a hashtag on social media.