Top Definition
The overwhelming sexual arousal and frustration whilst watching videos about Michael Jackson, looking at photos of Michael Jackson or listening to his voice.

Mikasms are more common amongst fans who regularly watch videos of Michael in the Bad era and the HIStory era, most notably because of his tightly fitting gold pants. However, Mikasms can occur at any time, as long as Michael becomes irrisistable.
While watching Michael perform "In The Closet" during the HIStory concert in Munich, a fan becomes flustered and announces "I just had a Mikasm, I'm just going to go and take a bath full of ice."
by BruneiLover May 29, 2011

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