1. A type of genital lubrication and/or spermicide. It is manufactured using canned tuna. It is believed that the term first originated in the South 6 quad of the University of Waterloo in 2001.
2. A student ritual that involves screaming "Tuna Lube!" at the top of one's lungs whilst simultaenously smacking a belt on the floor at 1:00 AM in the morning. Other aspects of the ritual include the playing of hall frisbee, hall soccer, Diablo II, Return to Castle Wolfenstein and Baldur's Gate. After hours of screaming the seemingly nonsensical phrase, participants may become disoriented and begin saying other apparently nonsensical sentences such as "Coming at yeeehah", "Toyota, good car" or "Jambalaya!". The ritual is concluded with a mass viewing of Smallville.
AK: Dude, did you smell that tuna from Alex's room?
DVT: Yeah man, he was using some tuna lube with that asian dude.