M
M or F, M/F - Male or female?
M - Male
M$ULKECRZ - Miss you like crazy!
M2CW - My two cents worth
M4C - Meet for coffee
M8(s) - Mate(s)
MA - Mature audience
MaB - Maybe
MAX - Maximum
MAY - Mad about you
MAYA - Most advanced yet accessible
MAYB - Mad about you, baby
MB, MAB - Maybe
MBN - Must be nice
MBO - Laughing my butt off
MBR$D, MBRSD - Embarrassed
MBUC - Mind bogglingly unlikely coincidence
MBWA - Management by wandering around
MBX - Mailbox
MC - Merry christmas
MCIBTU - My computer is better than yours
MD - More dirt (physician)
MD - Physician
MDY - Month day year
Me 2 - Me too
MEB - Memory expansion board
MED - Minimum expected delay
MEGO - My eyes glaze over
MEM - Memory
MFG - More friendly garbage!
MFI - Mad for it
MFMF - My friend, my friend
MGB - May god bless
MGD - My gameboy died
MGMT - Management
MGR - Manager
MH - Mostly harmless
MHBFY - My heart bleeds for you
MHDC(A) - My hard drive crashed (again)
MHIFOE - My hovercraft is full of eels
MHM - Members helping members
MHO - My humble opinion
MHOTY - My hat's off to you
MIA - Missing in action
MIB - Mint in box (mint condition)
MIC - Made in China
MIF - Milk in first (for tea drinking)
MIHAP - May I have your attention please
MIJ - Made in Japan
MIL - Mother in law
MILG - Make it look good
MIN - Minimum
MIN - Minute
MISC - Miscellaneous
MITIN - More info than I needed
MIX - Member information exchange
MKA - Mundanely known as
MKOG - My kind of girl
MKOP - My kind of place
MKOW - My kind of woman
ML - More later
MLA - Multiple letter acronym
MLAS - My lips are sealed
MM - Market maker
MM - Merry meeting you (greetings)
MM - Minutes
MM - Month
MMA - Meet me at
MMB - Message me back
MMF - Make money fast
MMFU - My mate fancies you
MMGAMOIO - My minds got a mind of its own
MMHA - My most humble apologies
MMHA2U - My most humble apologies to you
MMIF - My mouth is full
MMYT - Mail me your thoughts
MNC - Mother nature calls
MO - Moment
MOATYO - Mind of a ten year old
MOB - Mobile
MOF - Matter of fact
MOM - Moment
MOMN - Milk out my nose
MOMPL - One moment please
MOOS, MOS - Member of the opposite sex
MOP - Moment please
MOR - Middle of the road
MOR - Morning
MorF - Male or female?
MOSS - Member of the same sex
MOTAS - Member of the appropriate sex
MOTD - Message of the day
MOTM - Member of the month
MOTOS - Member of the opposite sex
MOTSS - Member of the same sex
MOV - Move
MPOY - My place or yours?
MRA - Moving right along
MRU - Most recently used
MS U LK CRZ - Miss you like crazy
MSB - Most significant bit
MSCEA - My southern comforts' empty again
MSD - Most significant digit
MSG - Message
MSMD - Monkey see monkey do
MSNUW - Mini-skirt no underwear
MSO - My sweet one
MSS - Member of the same sex
MSULKECRZ - Miss you like crazy
MT - My time
MTC - More to come
MTCW - My two cents worth
MTE - My thoughts exactly
MTF - More to follow
MTFBWU - May the force be with you (Star Wars)
MTG - Meeting
MTLA - My true love always
MU - Miss you
MUBAR - Messed up beyond all recognition
MUF - Material unaccounted for
MUG - Multiuser game
MUG - New user of a chat program
MUL - Multiply
MUM - Miss you much
MUNG - Mash until no good
MUSM - Miss you so much
MW - Midwife
MWA - A kiss
MWAIYR - More when, and if, you reply
MWBRL - More will be revealed later
MYM - Miss you much
MYOB - Mind your own business
N
N CASE - In case
N e 1 - Anyone
N - In
N(r) - Number returned
N/A - Not acceptable
N/A - Not affiliated
N/A - Not applicable
N/A - Not available
N/C - Not cool
N/M - Never mind
N/M - Nothing much
N/P - No problem
N/T - No text
N00b - Newbie
N1 - Nice one!
N2M - Not to mention
N2M - Not too much
N2MJCHBU - Not too much just chillin, how aBout yoU
NA - Not available
NAB - Not a blonde
NADM - Never a dull moment
NADT - Not a damn thing
NAGI - Not a good idea
NAHM - Not a happy man
NAHW - Not a happy woman
NAK - Nursing at keyboard
NAKA - Not acknowledge
NALOPKT - Not a lot of people know that
NAND - Not and
NAP - Not a problem
NAVY - Never again volunteer yourself
NAZ - Name, address, zip
NB - Nota bene (Latin) (note well)
NBD - No big deal
NBE - Not below or equal
NBFD - No big friggin' deal
NBI - Nothing but initials
NBIF - No basis in fact
NBIR - No basis in reality
NBL - Not bloody likely
NBTD - Nothing better to do
NBTYRSP - Now back to your regularly scheduled program(ming)
NBW - Never been worn