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This is the noise made by a live, swamp- dwelling mattress that is deeply moved by a story of personal tragedy. The word can also, according to The Ultra-Complete Maximegalon Dictionary of Every Language Ever, mean the noise made by the Lord High Sanvalvwag of Hollop on discovering that he has forgotten his wife's birthday for the second year running. Since there was only ever one Lord High Sanvalvwag of Hollop, and he never married, the word is only ever used in a negative or speculative sense
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