five-frase filibuster
Or "phive-phrase philibuster". Refers to a knock-knock joke, since its utilization needlessly adds lots of extra words to said utterance, especially in "everyday" or "ordinary" instances where a simple question or statement would have sufficed.
Employing a five-frase filibuster may indeed consume extra time and lung-power, but it also can often greatly relieve tension and cause a possibly-less-than-welcome statement/question to be received considerably more calmly and/or amicably than it might have been if you'd simply blurted it out "directly".