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1.
A person(s) who literally fires there seaman a large distance.
i.e. hitting your hair, shoulder or over your head and splatting it on every-day items.
Jack: Where did it go?
Sally: I can't find it!
Jack: Oh, its on the curtains.
Sally: Wow! You're a real wank cannon Jack.
by vValentine February 04, 2010