noun, noun or participle which takes 'suru'
Internet slang abbreviation of 落書き. Used for casual scribbles, doodles, or graffiti, often in online chats or social media.
See also: 落書き
授業中にノートにｒｋｇｋしてた。
I was doodling in my notebook during class.
壁にｒｋｇｋするのはやめよう。
Let's stop scribbling on the walls.