When one has wanked ones self to the point where the foreskin tears/splits in one, or several locations not unlike lips splitting in cold weather. Continuing to wank in the face this affliction can lead to further splits as well as a slight sting when urine or seamen makes contact with said wound.
Often appears unwelcome and unannounced and is only cured through a period of abstinence.
The challenge is to recognize it quickly & get the majority if not all of the urine in the toilet bowl. Piss shivers have the same effect.