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1.
A wank which leaves a person exhausted and weak because of the repetitive, strenuous motion of the arm.
The person ends up almost as weak as Superman when he is exposed to Kryptonite.
Person 1: Hey, want to go to town today?
Person 2: I cant, sorry, I'm recovering from a kryptonite wank.
by COOLBEAN.S March 16, 2011