いたずら書がきいたずらがきじ字FuriganaMeanings1nounscribbling; doodling; graffitiRefers to idle or mischievous drawings, scribbles, or graffiti, often done absentmindedly or as a prank.ノートの端はしにいたずら書がきをしてしまった。I ended up doodling in the margin of my notebook.壁かべにいたずら書がきをするのはやめなさい。Stop scribbling on the wall.