Pronounced sits, this neurological disorder is characterized by verbal obscenities being produced due to the watching or playing of any particular sporting activity. In beach volleyball the throwing of sand is a common side effect.
Note: Alcohol has been known to escalate the symptoms of the condition.
Liz: "Fuckin shit, why do I even bother playing this stupid goddamn sport."
Mary: "Feel free to ignore her. She suffers from S.I.T.S."
Gene:"Please forgive the language my S.I.T.S is acting up again."