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To search a video on Youtube.
"Hey man, let's watch that fat star wars kid?"

"Let's Youtuble that shit!"
by David Mason November 22, 2007
Verb. To stumble upon a video on Youtube that happens to tickle your fancy.
"Dude, I just youtubled upon this hilariously ridiculous video of Lady Gaga!"
by IChallengedGravityAndLost January 29, 2010