Craigslist uses mw4mw, for man and woman on man and woman, but other sites may use different abbreviations.
In the personal ads that I have seen, LOS means Lost or Stolen.
This abbreviation most likely stands for "Party and Play" when used in a personal ads,though it can mean "Plug and Play" when used to talk about technology. The abbreviation PNP when used in personal ads usually refers to the use of Crystal Meth.
professional
In Search Of
Long Term RelationshipLTR in personal ads means long term relationship.
transsexual for male
Friends With Benefits
"short Message service" in other words text. It's not exclusive to personal ads.
height weight proportionate
married man or married male
married black woman i think
Try web cam