The process of (often aimlessly) browsing YouTube videos via the suggested/related videos that are provided on the YouTube sidebar or at the conclusion of a viewed YouTube clip.
Refers to the concept of the "dream, within a dream, within a dream" from the movie Inception; except users are experiencing a video, within a video, within a video.
Can often be a great way of finding obscure and random YouTube content that usually ends up being a world away from the initial search.
"Dude, I found this hilarious video of a kid falling off a see-saw"
"Yeah, how'd you get to that?"
"Tubeception, man: I started on a Slayer video, then just clicked away until I ended up at see-saw kid!"
"I was so bored at home, I ended up having a Tubeception session and realised how many damn cats are on here!"
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).