Mm

M	ADM million (usually as "m"), as a suffix to a number (e.g. "12m")
M&A	BUS mergers and acquisitions, different methods of business combination
MA	EDU Master of Arts, a postgraduate higher education qualification
MAR	ECO LAW Market Abuse Regulation, an EU and UK law governing insider dealing and market abuse
MCFC	SPO Manchester City F.C., an English association football club
MF	MUS mezzo-forte (usually mf ), played moderately loudly SEX explicit and sexual language, a coarse insult
MFF	SEX sexual language
MI5	GOV MIL Military Intelligence, Section 5, the UK agency for domestic counter-intelligence and security
MI6	GOV MIL Military Intelligence, Section 6, the UK agency for foreign intelligence
MIA	LIN MIL missing in action, a person who has been reporting missing during combat
MiFID	ECO LAW Markets in Financial Instruments Directive, an EU law governing securities markets
MILF	SEX SLA explicit and sexual language, a sexually attractive woman who is or could be a mother
MMF	SEX sexual language
MMM	SEX sexual language
MMS	TEC multimedia messaging service, a communication medium for text messages and multimedia
MND	MED motor neuron(e) disease(s), a group of rare neurodegenerative disorders
MOD	GOV MIL Ministry of Defence (often "MoD"), the defence department of the UK government
MOJ	GOV LAW Ministry of Justice (often "MoJ"), the justice department of the UK government
MOT	TEC TRA Ministry of Transport, a defunct UK government department, but now refers to a vehicle test
MP	GOV POL Member of Parliament, a person who serves in a parliament MUS mezzo-piano (usually mp), played moderately quietly
MPG	SCI miles per gallon (often "mpg"), a measure of fuel economy in the Imperial system
MPH	SCI miles per hour (usually "mph"), a measure of speed in the Imperial system
MRI	MED magnetic resonance imaging, a form of imaging of the human body
MRNA	SCI messenger ribonucleic acid (usually "mRNA"), single-stranded RNA embodying a genetic sequence
MS	ADM SCI millisecond (as "ms"), a measure of time in the metric system equal to 1/1,000th of a second MED multiple sclerosis, an autoimmune condition in which the body attacks its myelin
MSc	EDU Master of Science, a postgraduate higher education qualification
MSG	FOO SCI monosodium glutamate, a sodium salt and occasional food additive
MUFC	SPO Manchester United F.C., an English association football club
MW	ADM SCI megawatt, a measure of power in the metric system equal to 1,000,000 watts ADM SCI milliwatt (as "mW"), a measure of power in the metric system equal to 1/1,000th of a watt