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1.
That which is popular but ultimately worthless. often based upon media based images and embodying a crippling shallowness. By it's nature, transitory, so today's shitegeist is tomorrows chip wrappings. Defived from Zeitgeist, but embodying the meaningless of postmodern culture.
"Peter Andre and Katie Price define the current shitegeist"

"Britney's chavvy new look really captures the shitegeist"
by Motoguzzi May 23, 2009
 
2.
Noun. The general spirit of any unpalatable, lousy, or regrettable place or experience.
Within the shitegeist of my family reunion, I found a friend in the Jello shots.
by CasualD May 04, 2014