When your friend pays too much attention to your arse; they're a bum shark.
(Playing Call of Duty) Hey Logan why are you swimming so close behind me in the water? Are you a bum shark?
by Team Leader Joseph November 4, 2018
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The bum shark is a predator who seeks bum of the unsuspecting man.
OH NO WATCH YOURE REAR HERE COMES A BUM SHARK !!!!!!!!!!!

bum
by Finn2232 December 29, 2017
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