In the underground seduction community there are many acronyms and abbreviations. Here's a few.
AFC: Average Frustrated Chump. A guy who lacks good pick-up skills and really struggles to attract women. (Most guys are/were like this.)
AMOG: Alpha Male Other Guy. Another pick-up artist (PUA) competing for the same girl.
B: Babe. Attractive girl/woman.
BF: Boy Friend.
Bitch Shield: This is not a negative reference to women. It refers to a woman's behaviour while she is being harassed by men in a club/bar scenario.
C&F: Cocky and Funny. Refers to a pick-up style developed by David DeAngelo.
CB: Cock Block. Obstacles in between a pua and a target girl. Often a woman's friends can act as cockblocks.
C&B: Crash and Burn. A specific pick-up approach that went pear-shaped.
DDB: Doggy Dinner Bowl. Facial look of a girl desperate for a particular guy.
EC: Eye Contact.
FMAC: Find Meet Attract Close. A pick up system developed by a world-renowned pick up artist - Mystery!
FUG: F@cki*g Ugly Girl. On a scale of 1 to 10, a FUG gets -1!
HB: Hot Babe. Very sexy woman.
KC: Kiss Close. Kissing a girl after chatting her up.
Kino: Physical Touching. Often gentle touching and stroking with the ultimate aim to become more intimate.
LJBF: Lets Just Be Friends - a friend not a lover.
LMR: Last Minute Resistance. A woman's last minute resistance to having consenual sex.
MM: Mystery Method. A sophisicated system for attacting beautiful women.
Neg: Negative comment to slightly lower an attractive or very attractive girl's self-esteem so she becomes more vulnerable to being picked up.
NLP: Neuro Linguistic Programming. Hypnotic seduction.
One-itis: Obsession with one particular woman or girl. It’s mainly guys with poor pick-up skills (AFCs) that suffer from this.
Player/PUA: Pick Up Artist.
Sarging: Trying to pick up women.
Shit Test: A woman's comment or reaction to test a guy's confidence, self-control, etc.
SOI: Show of Interest. A sign during a conversation that there is some chemistry.
WARPIG: A very ugly girl! No further explanation necessary.
Wingman: A friend/mate who supports a PUA in picking up woman.
3s Rule: 3 Second Rule. Do not hesitate. As soon as a guy sees an attractive girl, he should approach her if it's convenient. If he hesitates, he misses a good opportunity and succumbs to fear of rejection, which stops most men approaching women.
Source:
http://www.adventures-of-a-pua.com/acronyms.html