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1.
verb- The a act of two or more friends watching Youtube videos and discussing them through IM, Text, Chat, etc.
David: Ill talk to you later

Mark: Wanna play football later?

David: No lets just Hit The Tube

Mark: Yay
by TinoDag November 02, 2010
 
2.
To take a really big shit.
"Man, those egg-and-cheese bagels are gettin' to me. I'm gonna go hit the tubes."
by Jonathan Nathan November 09, 2006