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Having inroduced 'FOBYAC' into to Urban Dictionary and wishing to retain somewhat of a theme, I now provide you with a second wonderful acronym, 'MFPOS'.

If, (when), used in open forum, calling someone a 'Mother Fucking Piece Of Shit' may provoke undue tension amongst those present, not least in the person towards whom 'MFPOS' has been directed, but again and with a degree of delight, once can openly verbally abuse a fellow human being, (perhaps one who is a complete tosser, whilst hiding securely behind the complete and total anonimity of these few choise letters........MFPOS!
Introduced subtly into every-day conversation, one may employ MFPOS in the following manner:

Covertly: "Excuse me, Sir, you're a MFPOS"
Enraged: "Oy, shithead, you're a MFPOS!!"
Questioning: "Tell me, are you a MFPOS?"
MFPOS by Drofnas Trebor June 5, 2007
Related Words
mupos MPOS mposto Muossar muzos MFPOS Mfposgbcs mmPOS mposted mposter

metal on mucosa 

The hamburgerizing effect that results from the contact of abrasive metallic dental-alignment hardware with the otherwise fragile, soft tissues lining the oral cavity; also a concern for other at-risk anatomy specific to certain advanced adult activities.
Gotta draw the line somewhere...the risk of permanent disfigurement from metal on mucosa just ain't worth it!
metal on mucosa by YAWA February 15, 2019
Spanish slang for a snotty nosed kid. Used in a derogatory sense.
That pendejo ratted me out to the teacher, pinched mucoso.

Sure, we call him "El Guapo" now, but he was just a mucoso in Junior High.
mucoso by bountyhunter44 May 17, 2014
Multiple POSitions available during time spent with an escort.
"I got MPOS with her, cowgirl & doggie."
MPOS by Dyvine July 22, 2006

Muopsies 

When you observe either an appearance or a behavior of someone that really bothers you and you can't quite find the right word to describe this annoyance - Calling some a Muopsies (adjective) or naming someone a Muopsies (noun) is a combination of all of the derrogatory words you were thinking of into one.....perfect.....word
That Muopsies wearing the striped shirt is holla'in at your girl!!

Don't be such a Muopsies Jones.

Only a real Muopsies would not drink this liter of vodka.
Muopsies by PC so Greasy July 18, 2007

Mumostificated

Has no meaning. an be used in any context. Word can be used as a noun, verb, adverb, adjective.

Conceptualised by SHills, Trinidad and Tobago
This paperwork left me mumostificated.
I cried mumostificatedly.
The mumostificated boy was hungry.
Mumostificated by Abel.TT October 10, 2018