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1.
One who invites oneself to partake in your weed, especially right as you light a freshly-packed bowl; a hybrid of cannabis and bowl and a homophone of cannibal.

Someone who Bogarts your bowl.
Pussy McGee: Yo, is that OG Kush? Let me hit that!
Eight-Foot Cock In Sunglasses: Fuck off you cannibowl.
by John, A Goat From Space February 20, 2011