A lot of the terms used are antiquated, but I've been posting a lot of old posts and it helps to know what the hell they're talking about.

• PUA: Pickup Artist. Somebody who goes out to meet and sleep with women in a relatively short amount of time.
  
• AFC: Average Frustrated Chump
• Open: Start a conversation with a woman.
  
• Sarging, to sarge: Going out to meet and sleep with women, usually from a cold approach.
  
• mASF: Originally the newsgroup Alt.Seduction.Fast, then the conversation moved to fastseduction.com where it known as moderated ASF (mASF). Then the owner sold mASF, the website goes up and down more often than a yo-yo, and the bulk of discussion moved to pua-zone.com.
  
• FB: Fuck-Buddy or Friends with Benefits. A woman you sleep with, with no expectation of emotional involvement
  
• mLTR: multiple long-term relationships. Like a FB, but with emotions involved. Ideally you should start women out as FBs and only upgrade after several months of good behavior.
  
• oLTR: open Long-Term Relationship. Like a mLTR, but you're emotionally committed to one woman while sleeping with other women. I think it's too close to monogamy to be a good idea, but the term comes up in some of the posts.
  
• Soft Next: Cutting all contact with a woman for up to a week or more.
  
• Hard Next: Permanently cutting a woman out of your life. Necessary if she threatens your health, safety, or material possessions, even in little ways.
  
• Freak: A woman with Borderline Personality Disorder.
  
• Ho: A gold digger
  
• Good girl: A woman who is neither BPD nor a gold-digger.
  
• LSE: Low self-esteem
  
• HSE: High self-esteem
  
• HB(#): Hot Babe, followed by a numerical rating of her appearance out of 10. So a HB10 would be the hottest of the hot. Note that appearance is subjective and the whole HB numbering scheme probably shouldn't be emulated here.
  
• LSNFTE: Long Soft Next For Temporary Exclusivity. (Damn, BD really needs to come up with a better acronym for that.) When a woman stops seeing you to get monogamous with another guy. If you do everything right, it's a temporary thing.
  
• NRE: New Relationship Energy. The blissful, walking-on-air feeling that accompanies new relationships. It's a biochemical trick of your body, and it generally wears off in 6-18 months. Don't make any promises before then, you'll just be screwing yourself over.
  
• oneitis or one-itis: An obsession with getting one particular woman. If you find yourself asking "How do I get this one woman?" the answer is probably, "You can't. Now GFTOW." Speaking of which...
  
• GFTOW: Go Fuck Ten Other Women. The idea is that after fucking ten other women you'll see that this one woman you've been pining over isn't so special. If you can't or won't GFTOW, that's what you need to focus on fixing.
  
• Alpha male: A man who is sexually attractive to women.
  
• Beta Male: A man who doesn't have leadership and is not sexually attractive to women.
  
• BT: Buying Temperature. How likely a woman is to sleep with you right now based on her emotional state. High BT doesn't last very long and it doesn't discern between potential partners.
  
• IOI: Indicator of Interest.
  
• Kino: Touch
  
• LD: Low sex Drive
  
• HD: High sex Drive

All right, that's all I can come up with. Let me know if you spot any other acronyms or terms in the postings that aren't immediately obvious.

EDIT:

• NLP: Neuro-Lingustic Programming. An approach to pickup that used hypnotic language to push the woman through emotional states. Not commonly used nowadays.
  
• Kino: Touch. Derived from "kinesthetic".