A fountain of liquid that results from mixing smegma with diet Coke. The resulting violent eruption can damage the genitals if protective equipment is not used.
The smegma fountain was much more impressive than the Coke and Mentos mixture.
A guy who plays with himself by putting his hand in his pocket and rubbing.
I can't believe you did the Jonathan while waiting in the grocery line.
That Jonathan left some cream in my jeans.
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