Out Of Character Meaning – GTA RP Terms GTA RP Servers GTA 5 RP, GTA RP Servers, Rules GTA RP Comments Out Of Character Meaning – GTA RP Terms Out Of Character GTA RP (Image via GTA RP Servers) OOC stands for Out Of Character. While you are in OOC mode, whatever you type in the chat is written as your real self and not the fictional roleplaying character on the server.