1. Roleplay (RP)
Taking a role, and playing it. In SA:MP-World the word "Roleplay" is defined as "Acting as In Real Life". Roleplay is the main reason why Roleplay servers are being created, as roleplay is always fun as long as it's realistic and roleplay rules are not BROKEN.

2. In Character (IC)
Information and things which involve only YOUR CHARACTER. Your character driving, eating, working, chilling, smoking pot.. And so on.. Using smilies while being IC, is forbidden, you can use /me and act that your character is Ex. Smiling.

You write: /me is laughting out loud.
It shows out: George Koveli is laughting out loud.

3. Out of Character (OOC)
Information and things which involve YOU. Special channels are made for this to talk OOCly. You can talk about what you are doing currently. You can write anything in there, as long as it's not OOC insults, other than IC, where every sentence must be completely roleplayed. Your Out Of Character information/things shouldn't affect your In Character actions. (If it does, it is metagaming, read  about it below.)

4. Metagaming (MG)
Using OOC information IC. This is rulebreaking, which is not tolerated and strictly forbidden. Basically, you find out In Character information by Out Of Character actions.

Example of Metagaming:
Jack meets George, while Jack doesn't know Georges name. He looks above his head to a tag, reads it and says: "Hi, George". This is most common metagaming example on BBPRP. In Real Life there isn't any tags above your head, which would describe your name, but in SA:MP there is.

Right Way: A right way to get another person's name is asking them.. --> "Hi, what's your name, I'm Jack!" George replies: "Hey Jack, I'm George, nice to meet you!" - Right way to get the name, without metagaming at all!

5. Powergaming (PG)
Either forcing another player into a RP situation, which ends in the other player's disadvantage, or doing unrealistic things, which you couldn't make IRL, such as roleplaying taking out a minigun from your back pocket, you can't do that in real life, or can you?

Here is few examples:

First example:
You want to kill Person B. Let's name him, Bob.
/me shoots Bob from his deagle and kills him - .WRONG.
Why is it wrong?
You have forced him into a RP situation, where he must commit suicide. You must let him to resist.

/me aims at Bob's head and shoots. /do Do the bullet hit him? - RIGHT.
He can resist now, by either jumping, crouching, or whatever he can do with realistic roleplay.

Second example:
Doing unrealistic things. [/me]takes a can and throws it full power, and it falls to the moon. - WRONG.[/me]
No one could do that In Real Life. You must be realistic!

Sadly, people abuse the powergaming rule, since they are so smart and tough that they think they can resist everything.

6. DeathMatch (DM)
As a concept, its killing a player for no reason. Just shooting/punching them because he likes to shoot/punch and kill, and it's forbidden. If you like deathmatching, go to a deathmatch server.

7. Revenge Kill (RK)
Attempt to physically harm a player who killed you before for the same reason - killing you.

Some people think that Revenge Kill is only when you actually kill the person, but it is also a physical harm.
This is simple - you are going to kill your killer, for revenge. You can't do that, because of a simple rule - when you "die" (critically injured, unless it's a Player Kill), you lose 30 minutes of memory. So you can't remember who killed you.

Associated with Metagaming (Rule Number 4) <-> (Above)

8. Kill on Sight (KOS)
Either killing everybody you see (associates with DeathMatching, rule number 6. -> see above), or killing a certain person you hate as many times as you want. This is STRICTLY forbidden and not tolerated.

The term is not so used, but its alive.

9. Driver Drive-By (DDB)
Shooting from a driver's position with a gun. Forbidden, why? Because it's very fast and auto-aims at the target. Only your mates sitting in passenger's position may shoot.

BUT, we can't really drive cars unless we steal one after escaping from jail..

10. Car Ramming
Attempt to physically harm a player or his vehicle with another vehicle. Forbidden, because it increases Non-Roleplay.

Not a used concept on BPRP.

11. Non-Roleplay name (NON-RP name)
A name which isn't suitable In Real Life.
A name cannot be non-sense, such as "12345_ewrs", the First Name and Last Name first letters must be capitalized, and the name can't have numbers.
In short, give your character a name your mother would give to you, your mother wound'nt call you Mr_GaySmith69?

Example of a good roleplay names:
Jake_Willson, Dimitri_Drakovich, Sonny_Laredo.. and so on..

12. Drive-by Parking
Harming a player with your vehicle planted on him. This is not allowed simply because that it would be abused.

Also not a used concept on BPRP.

13. Spawn Killing (Sometimes SK)
Repeatedly killing players/player where they spawn. Associated with DMing, rule number 6. and KOS, rule number 8.. (See above)

14. Logging to avoid
Exiting the game with either "/q", or pressing esc, choosing "Exit Game" and then "Yes".

There are 3 types of logging to avoid:
Death, Arrest, and RP Situation.

In Real Life you can't just disappear, except if you have powers like Harry Potter, but it's actually a cloack he goes under.

15. Exploiting
Abusing bugs. Simple, it's just exploiting game/script bugs for your advantage. Not gonna say any examples, as people might abuse them.

16. Chicken Running
Running in zigzags to avoid being shot at. It's running like a retard from side to side.

17. Bunny Hop (BHOP)
Holding "sprint" button and jumping at the same time to travel faster. Associates with non-RPing, no one jumps In Real Life to travel faster, lol.

18. Healing in a fight
Just as it's named. You can't heal in any fights.
You must either make sure you've completely evaded/eliminated your threat, and go to replenish your health points.

19. BackShoot
Rarely used concept. It's luring an opponent into a narrow path, running almost near to the end, then quickly aiming at your opponent and shooting him. He has no time to react and suffers the damage.

This rule is not used on BPRP.

20. Player Kill (PK)
It's not the same as a normal kill is. You will lose your memory, and status in faction.

21. Character Kill (CK)
This is the ultimate kill. If you get CKed, or CK yourself, you will lose everything. Your items and money gets removed. The account is sometimes banned (only the account's name, not the IP.) It is a must to completely roleplay it.

22. Planebombing
Getting a plane and bombing it into a crowd of players causing major damage to them, which most likely ends in death of those players. Not allowed, would be abused and it's Non-RP to do that, expect if you wan't to RP a terrorist and get your character CK'ed, lol --> Rule number 21.

Not used on BPRP.

Gun from ass
Non-RPing taking a weapon out of inventory aka scrolling to change/draw a weapon. , so please, rolepaly it next time if you have braked the rule .

Example: /me takes out a knife from under his shirt, by his hip.
Gun in ass - Vice Versa to Gun from Ass, should be roleplayed too.
Example: /me puts his knife under his shirt by his hip.