OK, now we'll talk about some special terms used by the ppl in CS. There're also some terms which created by the LP members ourselves. Hopefully, this will help you to avoid from being call a newbie.....

• Camper - a ppl who hide in a certain place, move nowhere, wait and shoot his enemy who doesn't notice him is called a "camper". Usually, the camper is the last person to die. In chinese ( cantonese actually ), we also say that the camper "yam" his enemy. So, we'll call them "Yammer" instead of camper ..:-)
• Backstab - If you successfully move to the back of your enemy without letting him know and kill him, then you will be consider " backstab " him. The LP members likes to call a backstabber as " assassin ", also abbreviate as " ASS ". And when the assassin goes into the ventilation hole ( such as cs_assault ), we'll cry " ASSHOLE, ASSHOLE "....
• TK stand for TeamKiller.

• MB is the abbreviation of " meat biscuit ", which means a very weak person ( rou bing ). We also call a VERY VERY weak person as MBPB, which stand for " Meat Biscuit Punching Bag " ( rou bing sa bao )....

If you have more CS terms, please let me know.