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Mark Rober. A uncle who worked at NASA and now makes genius videos on youtube
Frank: Hey, that’s a cool uncle!
Jerry: Yea, he’s Mark Rober!
Frank: Cooooooooooooooool!
by Dinglederper May 28, 2020
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Any guy named Xavier who takes his niece and nephew to go see Detective Pikachu on the day it comes out.
That guy, Xavier, is the epitome of a cool uncle.
by Coolguy X May 08, 2019
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