Top Definition
A sudden, involuntary inputting movement generated through frequent work with unstable computer programs.
Walter: I had been working on that scene for hours when the bloody ProTools crashed. I thought I had lost everything!
Randy: Really?
Walter: Actually, the Apple-S Spasm must have kicked in. Turns out I had saved the project only moments before the crash.
Randy: You're a legend!
by joakim22 November 30, 2011

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