A strange phenomenon that has come from the Adult Sex Dating and Online Chat world is the prolific use of acronyms. More so in chat environments where the key to good online chat is to keep the conversation going without spending all your time typing out long sentences and potentially putting the other person off by making them wait for responses.
Knowledge of the most popular acronyms will stand you in good stead when using Adult Dating Chat as well as on your Adult Personals.

Adult Sex Dating and Swinger Glossary

AC/DC bi-sexual person
BBW Big Beautiful Woman
BDSM Bondage Discipline / Dominance submission / Sadism Masochism
BD Bondage/Discipline
BF Boyfriend
BHM Big Handsome Man
BiM Bisexual Male
BiF Bisexual Female
CD Cross-dresser
CPL Couple
DDF Drug and Disease Free
DP Double Penetration
FA Fat Admirer
F2F Face to Face, Meeting in Person
GBF Gay Black Female
GBM Gay Black Male
GWF Gay White Female
GWM Gay White Male
GF Girlfriend
GSOH Good Sense of Humour
HWP Height & Weight Proportional
IR Inter Racial
ISO Insignificant Other
ISO In Search Of
LDR Long Distance Relationship
LMAO Laughing My Ass Off
LOL Laughing Out Loud
LTR Long Term Relationship
MBA Married But Available
MILTF Mother I'd Like To Fuck
MILF Mother I'd Like To Fuck
MWC Married With Children
MWF Married White Female
MWM Married White Male
NLP No Losers Please
NS Non Smoker
NSA No Strings Attached
NUMP No Ugly Men Please
NUWP No Ugly Women Please
PA Photo Appreciated
PF Professional Female
PM Professional Male
PMSL Pissing My Self Laughing
QT Cutie
RL Real Life
ROFL Rolling On Floor Laughing
SALT Single and Loving It
SBF Single Black Female
SBM Single Black Male
SCF Single Christina Female
SCM Single Christian Male
SHF Single Hispanic Female
SHM Single Hispanic Male
SINK Single Income, No Kids
SJF Single Jewish Female
SJM Single Jewish Male
SO Significant Other
SPARK Single Parent Raising Kids
SWF Single White Female
SWM Single White Male
TG Transgender
TIC Tongue in Cheek
TS Transsexual
TV Transvestite
TOY Thinking of You
VWE Very Well Endowed
WEG Wicked Evil Grin
WLTM Would Love to Meet

You may even come across variations of these (for example. WE = Well Endowed) but soon you will realise what these acronyms mean without even thinking.