Top Definition
Extreme sport involving a quite large inner tube, and a pool to jump into. You jump off anything available, pull a crazy arial maneuver, stick it by landing in the pool safely on the tube.
Harold: Holy fuck! Did you see that! I pulled an inverted 180 Sky Scratcher!
Sean: Fuck yeah I saw that! Extreme Tubing rocks!
by benormous April 23, 2006

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