Top Definition
A condition whereby an individual has encountered entirely too much gnarly action (usually skiing/boarding) in one day or thrown down an incredible trick in the park.
"Man the conditions were so epic I caught gnarmonia out there!"

"You see that 10 that guy just threw fakie? He's gonna come down with gnarmonia for sure"
by liquidfire9850 February 27, 2009
7 Words related to Gnarmonia

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