The term "stat," often heard in hospitals, is a medical abbreviation that denotes urgency. The term is derived from the Latin word "statim," which literally translates to "immediately."
While many people mistakenly believe that the term "stat" is an acronym, it is simply an abbreviation. When a doctor or other hospital worker orders something to be done "stat," it means that he expects the duty to be completed with no delay.
Some medical workers refer to the term "stat" in a comedic way as being an acronym for "some time after tomorrow." This definition is an antonym for the original meaning of the term and means that the duty is not likely to be completed within the desired time frame.