This is what you get when you try to type in fancy characters like É or ó, and you get garbage instead. From the expression "letters not (what they should be)".
Called mojibake ("character change") in Japanese, krakozyabry ("childish scribbles") in Russian, and Buchstabensalat ("character salad") in German, among others.
when a person gets annoyed by another's boring, pointless story telling, and without notice, pushes in one nostril and launches a wod at the idiot from the other nostril to make them stop for a short period of time