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The act of masturbating with one hand while making a 'shanking' motion with the other, knife-filled, hand.
I'm gonna have me a shank wank!
by efildrot September 24, 2013
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A Shank Wank is where if you are held at knife point by some road men you’d have one last final wank before you’re sent up into the council estate in the sky.
guy 1: Did you hear the news

guy 2 : yeah I did apparently someone was found dead this morning

guy 1 : Yeah he must of totally had a shank wank

guy 2 : totally man
by Broham May 30, 2019
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