Tasteless medical slang. For obvious reasons, most of these terms are not used in front of patients, but only in the staff room.

(There is a supposedly true story of a physician who used the term "TTFO" in a patient's chart, which stands for "Told To F*** Off". When the patient later sued, the judge asked the doctor what the abbreviation stood for, and the doctor was quick-witted enough to answer, "To Take Fluids Orally".)