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An embarrassing mistake made while playing the viola. More often than not, Fumbledumbles occur while playing the easiest part of the entire composition.
Teacher: "Wait, wait, stop!! Did you honestly just play an F sharp?!?"

Student: "Yes..."

Teacher: "But it's a C Major scale!!"

Together: "Oops!! Fumbledumble!!"
by Wataru June 29, 2008
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