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1.
having a shark dick means that you enjoy having sex while your girl is on her period. Sharks go after blood.
Ralf has got a shark dick.
by Rhonda Mchillfinder September 23, 2012
 
2.
The act of wraping the penis with barbed wire and then having intercoures
I'm going to impale you with my shark dick
by oldfatman418 March 11, 2010