What does "RP" mean?

人品，类似运气的意思。与运气不同的是人品是可以积攒，也可败掉。发福利或分享竟经验是最常见的攒RP方式

ENCharacter, similar to luck. Unlike luck, character can be accumulated and lost. Giving benefits or sharing experience is the most common way to accumulate RP.