Serious knee injury needing medical intervention. Usually caused by engaging in stupid behavior whilst intoxicated.
Enrique got kneemonia from jumping off a balcony to escape the scorn of a cheated-on husband.

Or

He got kneemonia due to getting jumped by a 16 year old whilst play wrestling under the effects of alcohol.
by Fassbender February 5, 2018
Get the Kneemonia mug.