(NASA, nuclear power, space science) Initialism of Radioisotope Power System. / (nuclear power) Initialism of Reactor Protective System. / Initialism of rock paper scissors.

plural of RP

(linguistics) Initialism of Received Pronunciation. / (video games, ESRB) Initialism of rating pending. / (pathology) Initialism of retinitis pigmentosa. / (role-playing games) Initialism of roleplay.

Initialism of Rhineland-Palatinate, a federal state of Germany. / Initialism of Republic of Poland. / Initialism of Republic of the Philippines (former two-letter country code).

(transitive, intransitive) To roleplay.

rupiah

(linguistics) The form of Received Pronunciation used by the upper classes.

(astronautics) Initialism of rocket propellant 1. (a highly refined kerosene; usually used in combination with LOX)

(video games) To make the character one's playing walk, as opposed to running, which is the default form of character movement in most video games.