Role-Play Terms:
• RP --- Role-Play
• RPM --- Role-Play Maker/Master
• RPH --- Role-Play Helper/Co-Manager
• PvP/MvM --- Member vs. Member or Player vs. Player
• PvE --- Player/Member vs. Environment/RPM.
• OOC --- Out of Character
• IC --- In Character
• BIC --- Back in Character
• PP/GM --- Power-playing, God-modding
• NMC/NPC --- Non-Member/Player Character
In case you've encountered some uncommon acronyms you can read them all here.