(verb) Hating on someone because of them being "irrelevant," which was what the famous YouTuber "Ricegum" did in his prime days... such a shame that he's also irrelevant now.
Billy: Dude, Geometry Dash is so irrelevant. I can't stand it.
Jilly: What the fuck is up wit' you? Why you riceguming all of a sudden?
(adverb) My way of saying "genuinely."
Billy: "YOOO this Geometry Dash update is soooo cool!!"
Jilly: "That shit jainly looks fake. Why is you showin me this bruh?"