Phrase used by an EKG monitor technician, to initiate conversation with a registered cardiac nurse, to inform them of a fatal cardiac dysrhythmia. Usually used for ventricular fibrillation or asystole. Phrase may also be used in reply by the RN to the technician.
Tech: "Oh, Shit!" RN: "What's the matter?" Tech: "The patient in room 3014 is showing asystole on the monitor." RN: "Oh, Shit! That's my second flatline this week!"