ro-ro, slang for coronavirus or covid-19. Although it is an upper respiratory virus, it can be contracted by any humanoid who has been peckerized, or received an oral exam over the past 14 days.
Somebody who acts like a dumbass or a retard on purpose or just plain stupid. Has nothing to do with people with developmental disabilities, but this term has used in a condescending way against the mentally challenged.
Ragnarok Online; a MMORPG released by Koran based Gravity corp, quite often played on by private servers like many games that have gone p2p (pay to play). Many players that play iROSE have at one point played RO.