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Noun: Something so utterly mundane or boring as not to be worthy of remembering. Especially appropriate if you roll the R and say the word in a thick German accent.
Stooge #1: "Dude, do you remember that one time when I told that average joke that one night of no significance?"

Stooge #2: "That's utter rhinebotton, why would I?"
by Benny Kirf March 03, 2010
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