| Acronym | Meaning |
 | MFD | Measure For Dispatch (coffin), (severely Ill Or Dying) |
| MGM | MGM Syndrome (as In The Movie Maker) - Faker Putting On A Real Good Show |
| MICO | Masterly Inactivity And Catlike Observation |
| MICOS | Masterly Inactivity, Cat-like Observation And Steroids |
| MIDI | Myocardial Infarction During Intercourse (heart Attack During Sex) |
| MILF | Mother I'd Like To F**k. US Version Of GLM Who Is Also PHAT |
| MTF | Metabolize To Freedom (i.e. Let The Person Sober Up, And Then They Can Leave) |
| MU PAIN | Made Up Pain (especially For Sick Notes And Insurance Claims) |
| MUH | Messed Up Heart |
| NAD | Not Actually Done |
| NARS | Not A Rocket Scientist (low IQ) |
| NETMA | Nobody Ever Tells Me Anything (generally A Doctor's Gripe On A Patient's Chart) |
| NFR | Not For Resuscitation; Used On Elderly Patients' Charts Where The DNR (Do Not Resuscitate) Instruction Is Without The Knowledge Of The Patient Themselves Or Their Family |
| NFS | Neuro-faecal Syndrome - Sh*t For Brains |
| NGMI | Not Going To Make It |
| NKDA | Not Known, Didn't Ask |
| NLPR | No Longer Playing Records (dying) |
| NPS | New Parent Syndrome |
| NQR | Not Quite Right |
| NQRITH | Not Quite Right In The Head |
| NSA | Non-Standard Appearance (what A FLK Grows Into) |
| NWB | Negative Wallet Biopsy - (US) Patient Transferred To Cheaper Hospital Because They Have No Insurance / Funds |
| OAP | Over-Anxious Patient |
| OBE | Open Both Ends (known In UK As DNV - Diarrhoea And Vomiting) |
| OBS | Obvious Bullsh*t |
| OFIG | One Foot In The Grave |
| OFIGATOOS | One Foot In The Grave And The Other One Slipping |
| OMGWTFBBQ | Oh My God, What The F*ck, Bar-be-que; A Person Mangled In A Car Crash |
| OPD | Obnoxious Personality Disorder |
| OTD&DDR | Out The Door And Down The Road. |
| OTDPDS | Out The Door Pretty Damn Soon |
| OTLP | On The Launch Pad (to Be Discharged To Home) |
| P4P | Penicillin For Prick (peniecille For Penile Discharge) |
| PAAF | Pissed As A Fart (also PIAF -PIssed As A Fart) |
| PAFO | Pissed [Drunk] And Fell Over |
| PBAB | Pine Box At Bedside |
| PBABLTO | Pine Box At Bedside, Leave Top Off |
| PBLS | Positive Blue Legs Sign - (US) Resuscitation Behind Closed Curtains (US ER Medics Wear Blue Scrubs) |
| PBOO | Pine Box On Order |
| PBS | Pretty Bad Shape |
| PBTB | Pine Box To Bedside; Indicates An Imminent Demise |
| PCUINIA | Please Consult Us If New (Surgical) Issues Arise - I.e. Please Never Page Me Again |
| PDSD | Pre-Detention Stress Disorder - A Person Who Feigns Medical Symptoms When Police Handcuff Him |
| PEFYC | Pre Extricated For Your Convenience (RTA Victim That Has Gone Through Windscreen) |
| PEP | Pharmaceutically Enhanced Personality - Stoned Or Medicated |
| PFH | Parent(s) From Hell (custodians Of BFH - Brat From Hell) |
| PFO | Pissed (Drunk) And Fell Over |
| PGT | Pissed (Drunk) And Got Thumped |
| PHAT | Pretty Hot And Tempting (warning To Others) |
| PHS | Positive Hilton Sign - Demanding Patient Expects Hilton Hotel Luxury; Indicates Patient Well Enough To Leave! |
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