Reference to film star Greta Garbo, evoking a quiet, mysterious, private, calm, serene, poised disposition. Not needing to justify yourself; allowing the other person to imagine whatever they like while you keep your cool.
"Tranquility is the greatest manifestation of power."
The scandal did not ruffle her feathers, she remained garboesque through the entire ordeal.
by Psycstar September 21, 2006
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