A granfalloon, in the fictional religion of Bokononism (created by Kurt Vonnegut in his 1963 novel Cat's Cradle), is defined as a "false karass".
That is, it is a group of people who affect a shared identity or purpose, but whose mutual association is meaningless.[vague]
[A] granfalloon is a proud and meaningless collection of human beings...
and cites Hoosiers as "one of [Vonnegut's] favorite examples."
