Present participle of flub; the act of making a mistake or performing badly right now.
Formed from 'flub' plus the continuous suffix '-ing'. This creates the progressive tense showing an ongoing action of making mistakes.
Flubbing is the middle of the mistake—not past, not future, but the actual moment of bungling. In acting, directors would yell 'keep flubbing it!' meaning actors should keep messing up on purpose for comedic effect.
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