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Gronknasti - Noun, Verb, Adjective. Definition - Noun - A dance move that resembles the Giant Wacky Waving Inflatable Arm Flailing Tube Man, made famous by current New England Patriot, Rob Gronkowski. Definition - Verb - Describing the act of Gronknastiing. Definition - Adjective - Witnessing an event that is shockingly priceless.
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