PFF, as defined by season2 episode 25 of My little Pony Friendship is Magic, stands for Pony Friend Forever. Used by ponys in Equestria for friends they will always have.
a tribe of humans who are the descendent's of people who gotlost inside a Walmart; walmart native tribe, often colonies are found near the toy department.
I think I saw the triggledock people hunting in the cereal section.