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1. Noun: An extremely loud and powerful fart that commands admiration and deference.

2. Adj: Shockingly loud, commanding - used especially as a description of farts.
The conductor raised his hands as the audience quieted in anticipation and to their profound amazement he unleashed a fartissimo!

Greg made a strong effort and managed a good loud fart, but Jacob's was fartissimo!
by onehandcrabbing November 14, 2011