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10.
The act of searching through many youtube videos, trying to find the best one. Similar to "Surfing", but specifically on Youtube.com
Pete - "Hey dude, lets go tubing"
Will - "alright, let me go on youtube"
Pete - "We need to find the sickest video!"
by XeScience January 22, 2009
 
1.
The act of going down a slow moving river in an inner tube.

However it must involve copious amounts of alcohol and the viewing of at least one set of nekkid tits. It is not tubing unless there is at least one white trash girl in a thong flashing her tits like a drunken whore she is.
I went tubing on the guadelupe river in texas this weekend and saw spider's sister flashing everyone.
by Wagonburner July 18, 2005
 
2.
Sex act involving two men where tube-shaped items are placed in the urethra in order to expand the size of the "japseye" hole. The tubes are increased in size daily/weekly over a period of months untill the penis-hole is large enough for the other man to insert his penis.
Dude, next week your cock-hole will be large enough for me to enter you.
by Mr T May 25, 2004
 
3.
A term - perhaps invented in Muskoka - used to describe the watersport of being pulled behind a fast moving ski-boat on a large sea biscuit or inner-tube. The inner-tube usually has a smooth bottom, furnished so as to not end up in a phenomenal cartwheel-like wipeout; although this is infact what the watchers of the tuber are looking for!
The best way to tube is to criss-cross the boat wake gaining a wider and wider arc so as to increase speed to upwards of 100 mph. Once this speed is neared, the tuber is likely to hit the wake, become airborn and perform a maniacal wipeout forgotten since the days of Evel Kneivel.
Max: "Look at those dudes tubing. The boat must be doing 50, the guys gotta be arcing at a-hundred!!!"

Scott: "Woaaa...there he goes!.....There's the tube....Where's the dude?!!"

Max: "THERE HE IS up in that pine tree."
by psiscott April 11, 2006
 
4.
'tube-ing'
The art of extraordinary drinking. Tubing is not just a drinking session, it is a form of sport. Experienced Tubers take the activity very seriously and have made it an Olympic Sport. The BRitish Olympic Tubing Team are the world champions and world record holders. Recent Tubing events have included fixtures in Melbourne, Sydney, Cathay Pacific Airlines, Barcelona and Hong Kong (for the Hong Kong Tubing Sevens).

Tubing was invented on Sunday 29 January in Whistler, Canada. The founder members were planning on going 'tubing', the activity of bombing down a snow hill on a tractor tyre however they drank from breakfast until the early hours. The following morning Stuoobs said "I love tubing." BOTT was born.

The Anthem for BOTT is "Tubing Through". A song to the tune of REO Speedwaggon's "Loving You".
Person 1 - "Fancy going tubing?"
Person 2 - "Ok."
by Andy Geoghegan October 10, 2007
 
5.
Making an extremely long clear tube from ones' couch to the toilet so that one may easily release shits from their couch and have the shit reach the toilet by traveling through the poop tube. This saves the person the walk from the couch to the bathroom. The tubes must also be clear colored so the person may "see what's going on down there".
I gotta poop but I don't wanna get up off the couch, i'll just start tubing and save the walk.

My tubes were off so I couldn't go tubing properly, the shit fell to the floor and rotted through my carpet! SHIT!!!
by sammyman67 September 25, 2012
 
6.
Using the grenade launcher that is included in the Grenadier kit in Call Of Duty 4: Modern Warfare
player1: Ah, what the fuck man...
player2: What? You can't handle getting pwned?
player1: Cuz you're fucking tubing, n00b!
by Regator March 12, 2009
 
7.
Penetrative sex using the hole provided by a colostomy. The recipient may or may not actually be alive. Tubing may also be combined with a mung should a suitable candidate be available to provide a true rush for sicko-thrill seekers.
Nightshift in the morgue was generally boring until Liam discovered tubing.
by McTastic January 26, 2006