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Commonly used in Seattle, means a good sound.

Any good sound.
"Have you heard the new shankbone?"

"Yup! I got the new album its hella tight"
by MeetMeInSeattle March 08, 2010
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To shank someone with your penis.

Often painful, but can be the best moment of one's life.
"OW!" cried Cassie, as Greg shankboned her. "Be gentle with me you Scottish bastard!"
by manyperson February 03, 2010
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