Top Definition
1) An extremely fast, uncontrollable spastic movement of the limbs, moving right down to the eyes.

2) A word invented by a drunken man trying to impress the rest of the people in the bar.
Terry had a microbiolic spasm when his aneurism happened.

A microbiolic spasm is best cured by halting any drinking.
by Murtag May 29, 2011
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