1 definition by Shane Gostelow

The combination of extreme pleasure and anxiety while watching an all-male band perform, and the realisation that you are attracted to them. Applicable in the context of heterosexual and/or homosexual desire, plus anything in between.
While watching Mangasm, Lincoln's finest band, i did indeed experience a Mangasm.

My girlfriend had a Mangasm while listening to The G-Spot Monks.

Dave couldn't control his Mangasm at the gig.
by Shane Gostelow January 16, 2007
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