Top Definition
the act of masterbating while having a plaster cast over the wrist in use.
James: "hey Pat, did you hear Alex broke his wrist?"
Pat: "yea, too bad he isn't ambidextrous, I bet his cock is burning from having to casterbate all week"
James: "I heard he deliberately broke his wrist because he enjoys the chafing"
Pat: "man, what a sick fuck"
by Jowak July 14, 2008

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