The splash of terlet water on your balls or ass because of forceful dumping while giving yourself a jerumpkin. Similiar to a blumpkano.
Note: Degrees of splash are important. If water hits your balls, ass and taint it's a category 3 jerumpkano.
The category 3 jerumpkano caused me to evacuate the terlet seat as I was unable to concentrate on finishing the jerumpkin.
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