If you are like most guys, you want to know the difference between BBBJ, BBBJTC and BBBJTCNQNS which stand for bare back blow job, bare back blow job to completion and finally no quit, not spit (i.e., swallows)

FS means full service, i.e. intercourse.

FBSM means full body sensual massage, usually with a HE (happy ending or hand job.)

GFE is girl friend experience, which doesn't mean much in particular as far as services but should at least indicate that she will behave in a lovey-dovey manner, at least in theory.

PSE is porn star experience, most often denotes that anal is on the menu.

There are also terms to keep in mind such as Russian (sex on or between her tits), Greek (anal) and Italian (On her butt crack, so called because it is next to Greece, get it?)

Now if you are into something a bit kinkier, there are all kinds of BD/SM (bondage, discipline, sado-masochism) to check out.

I would take your time and learn the entire glossary.  You will also find other terms in the Urban Dictionary which comes in quite handy.

Happy hunting.