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Frantic/desperate masturbation, possibly chronic.

Believed to have originated from the observation that male porn performers while attempting to achieve ejaculation for a cumshot will often masturbate so frantically that their hand movements become completely blurred.
"The website triggered an immediate attack of Blurry Hand Syndrome"

"The poor guy suffered from chronic Blurry Hand Syndrome when viewing photos of Megan Fox"
by fred9999 October 20, 2012
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