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A fortunate unforseen circumstance. An unexpected perk as a result of any given chain of events.
An obvious melding of the words fortunate + unforseen + circumstance.

This word originated as a forcumstantial product of a slip of the tounge by a friend attempting to say "Fortunate unforseen circumstance".

Its obvious poetry, and the way it trips lightly off the tounge make it a forcumstantial addition to any cutting edge lexicon or meme cache.
She was a fan of 70's zombie movies, and through luck and forcumstance, met a guy who was into Romero films.
by Dovetchka December 22, 2005
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