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poo-nah-mee NOUN 1. an unusually large wave or splash produced in a toilet bowl by a large or well-placed excrement (poo). 2. an exceptionally large, oderiferous or much-anticipated bowel movement. Origin: 2011-2012; < Brinston, Ontario, Canada. Based on Japanese word "tsunami", equivalent to tsu harbor (earlier tu ) + nami wave < poo (poo) + nami (wave).
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