http://www.shartwell.freeserve.co.uk/humor-site/medical-acronyms.htm
3Ps - Pill, Permissiveness and Promiscuity (relates to female patients with sexually transmitted disease)
45C - patient is one chromosome short of a full set (thick)
Acades vulgaris - medical students.
Air-conditioned - Multiple gun shot wounds
AHF - Acute Hissy Fit
APRS - (US) Acute Puerto Rican syndrome (bouts of screaming and yelling)
Bagrinhos - (Brazil) interns ("bullheads" - type of fish that gets in the way of real fishing)
BMT - Bowel-Movement Taco (faecal matter trapped in female genitalia)

Chocolate Hostage - constipated
CTF - Cletus the Fetus (US). A 23 week, or earlier, births that parents expect to survive against all odds
Dandruff on wheels - scabies or other transmissible flaky skin condition
Doing the Twirly - circling the drain (about to die)
FINE - F*cked up , insecure, neurotic & emotional
FOOBA - Found On Ortho Barely Alive (a play on FUBAR - F***ed Up Beyond All Recognition)
Goat Rodeo - Emergency scene which goes badly (resembles a bunch of people riding or wrestling goats) **ONE OF MY PERSONAL FAVORITES**
GROLIES - (UK) Guardian Reader Of Low Intellect In Ethnic Skirt
HAIRY PSALMS - Haven't Any Idea Regarding Your Patient, Send A Lot More Serum
International House of Pancakes - neurology ward full of patients (usually stroke victims) all babbling in a different language.
LFTWM - Looking for 3 Wise Men (applied to young pregnant females who deny having had intercourse)
NFF - Normal Fae Fife (Scottish version of NFN below)
NFN - Normal for Norfolk (rural area, suggests inbreeding or quaint rural oddness), might explain FLK
Paperweight - (NZ) very small patient with severe congenital mental ******ation
PEFYC - Pre Extricated For Your Convenience (RTA victim that has gone through windscreen)
PRATFO - Patient Reassured And Told to F*** Off
RPVU - Relative Porsche Value Unit: surgical index of potential income from the repair of patient injuries, usually orthopaedic in nature. Fractured finger = a windscreen wiper; a fractured hip = new tyres etc.
RTT with a BBB - Rat-a-Tat-Tat with a Baseball Bat (hit with blunt instrument).
Rule of Five - if more than five of the patient's orifices are obscured by tubing, he has no chance
Slow Code (to China) - elderly very ill patient who wants everything done so they will not die. Everyone on the medical team disagrees
SPAK - Status Post Ass Kicking
Two Stops Short of West Ham - (Psychiatry) Barking mad. Barking is slang for "mad" and also the name of a station; it is 4 stops from West Ham, but the psych slang follows the formula "2 sandwiches short of a picnic", "Tuppence short of a shilling" (simple-minded/nuts) - the deficit is alway 2 items. Severe madness is "Dagenham" i.e. "3 stops beyond Barking".
From the veterinary list on the same page:
CFT - chronic food toxicity i.e. obese